Edelbrock fuel pump problems I've done a little diagnostic, but I'm not good with electrical and am wanting opinions. The odd thing is I am reading a ground signal until the key is turned on then no ground and no pump. Apr 26, 2024 · See in the diagram that the fuel pump has no fuse. us/m8s1 Dec 6, 2021 · Fuel pumps especially demand a SOLID, 5-10amp 12+volts. Any thoughts? May 22, 2018 · I have a 68 Camaro with a 350 engine and a 750 edelbrock carb. It cranks fine in the garage after sitting a while, but restarts in the heat are a problem unless I switch to the auxiliary fuel tank located beneath the fiberglass tilt body (Boss Hoss trike). They are there everyday. 5. use Edelbrock regulator Mar 27, 2022 · Flooding on an Edelbrock carburetor is a situation where the float bowl is getting too much fuel and it is pouring over the top. Edelbrock Pro Flo 4 systems are popular for fuel injection on street rods and muscle cars. The carb is vented to the atmosphere, the fuel evaporates in three days time. The Fuel Pump must be mounted at or below the lowest point of the fuel cell and within 3 feet of the fuel cell outlet fitting. Fuel draining back to tank when key not on. For fuel to drain out of most carburetors made AFTER 1930, the car would need to be either parked on its top on in a gravity anomaly. As the plunger moves down with throttle movement, the slot is covered and the fuel in the well is forced through the discharge passage at the bottom of the well up to the nozzles, squirting into the primary venturi. Your plumbing will need some more fittings since it move the inlet and outlet to the bottom of the pump. 5. Install the fuel pump and Now for my fuel system plan. ) Since converting to EFI, I really like the in-tank EFI pumps, much quieter, and with a return style system and regulator the EFI pump can be regulated down to carb fuel pressures. Now it floods from the primaries at idle. Determine the ideal mounting location for the fuel pump, a secure location like the frame is ideal. The engine idled and ran on all eight barrels. Fuel pump pressure – test your fuel pump. I received the Summit G5219 coil last night and installed it. They put out approx. I have an older, since discontinued, Edelbrock #1722 fuel pump. Hotrod power tour is next week. Aug 18, 2012 · C3 Tech/Performance - Edelbrock 1721 Fuel Pump conversion HELP - I am replacing my stock mechanical fuel pump with an edelbrock 1721 mechanical pump. A bigger pump means more current and more heat and the sump's thermal capacity makes it well matched for the 255 lph pump that's already in it but nothing bigger. When your Edelbrock Pro-Flo 4 runs too lean or too rich under load, it can feel like your engine is gasping for air or drowning in fuel. We bypassed the Edelbrock Sump Pump (36031) wiring and it Aug 11, 2021 · The engine I am installing came with a Pro Flo 4 system. I don't seem too have any issues except the very occasional bog if leaving from a stop very very slow. PDF-Installation Instructions. Jan 8, 2012 · Oil leak from Edelbrock fuel pump. Jegs and Summit both say it’s discontinued. No problems with fuel starvation or flooding with the Holley 4224 Carburetors from idle to 5500 RPM. Sep 2, 2016 · I'll check the seal tonight on the old pump. The fuel pump must be mounted at or below the lowest point of the fuel tank. May 19, 2020 · I used to have the Mallory 250 pump, and never had a problem with it, but it was a bit noisy (but seemed quieter than the Holley pumps. Got plenty of fuel in tank and there is fuel at carbs . 4 amps. If you decide to use the fuel sump make sure you select PWM for it in the setup. Jan 11, 2020 · No, it would not be a good idea to use a fuel system rated to 600 hp to feed an engine expected to make 600+ hp. PF4 with edelbrock sump. It happened again several times and after stalling it would start up in a couple minutes without removing the line. My fuel pump is leaking. Finally it stalled and would not start so I removed the line and started the pump but fuel would not flow. NOTE: These pumps are only designed to push fuel from the rear of the vehicle forward, towards the engine bay. right now I have the tank relocated to under the bed floor on my 69 c10. I was using a Carter kit. com IMO, I'd get a current Edelbrock or Carter pump from an actual dealer, not some seller on eBay blowing out old leftover store inventory. Aug 26, 2023 · Hello all, i could use any advise or help towards a recent fuel pressure problem I’ve stumbled across. The old/current setup has 2 lines from the tank to the bowl and one going to the carburetor. If I'm paying premium price, I had better darn well be getting premium fuel! LOL Mar 30, 2020 · Was wondering if a pinched fuel vent can cause the mechanical pump to stop being able to pull fuel from the fuel tank. 65 SS L30 327, M21 Muncie, 331ratio 12 bolt rear, factory air 2. May 19, 2023 · I know this may not be the right place. Seems to occur shortly after truck reaches operating temp. I tried to adjust pressure but it doesn't affect it. Nov 7, 2020 · In reading the manual, I decided to go with an electric fuel pump delivering 5-7 psi to the Sump pump. Jul 9, 2016 · Hey guys, I rebuilt a 600 Edelbrock carb today. 2. Towards the back there are graphs showing the changes needed to alter the air/fuel ratio where it's needed. Jan 27, 2010 · The simplex pumps are everywhere, although NLA new. It is pumping fine right before and after. 25-6. I have to put the bad mouth on Holley pumps. What Jan 31, 2024 · Holley mechanical fuel pumps range from 80 GPH to 225 GPH in many various applications to meet the fuel demands of most engines. I know the pump comes preset at 6. Jun 28, 2017 · The combo: an Edelbrock carb, a mechanical fuel pump, and today's ethanol blended fuel. Aug 17, 2023 · I have a Carter on my big block which Carters are made in the USA. I note Dave on your Ford engine you have a standard looking fuel pump. I am see over 10 1/2 at idle which is causing idle problems. g. Dec 15, 2004 · It does look like the majority of the marine fuel distributors in NY have a clue, and are selling ethanol-free. I was looking at either the holley sniper tank kit i just did a 87 truck tank for tbi injection . BG fuel systems also used to sell them but they have closed up shop years ago. When first touching the throttle it often hesitates and sometimes lean pops, and this happens when taking off just off idle and also when shifting up (manual transmission). Nothing worked. Jun 9, 2020 · I was driving and suddenly it lost fuel pressure and finally died as it coasted to a stop. Feb 11, 2009 · You then attached the braided stainless steel line (8123) to the filter (the fuel line has the female -6AN threads on one end), and now you're trying to connect to the pump. When the key is on the PF4 computer connects fine. Could their something with in the system that could cause this. Use the fuel "vapor" line that goes to the charcoal canister "from" the fuel tank. I got a new intake fuel pump and tank, pro fly 4. My thinking is that I might try and stock a few components at my house that commonly go bad so that I hopefully won't have to leave the car parked (its my daily driver) Mar 25, 2016 · However, if something I say is wrong or you want to add please do so. My fuel pump relay is a typical automotive Bosch style 30Amp relay I had been previously using on my old Holley Blue pump. Common Problems With The Edelbrock Pro Flo 4. (each clock is 60 degree change) Nov 26, 2018 · Fuel pump wires are only 10 amps max. Not a knockoff pump. That pump lasted less than two hours of run time before the diaphragm failed and was spraying fuel all over my headers and could have very easily started a fire that Edelbrock part #17303 fuel pump is a gravity fed type pump with a simple 2 wire design. Sep 6, 2024 · I was using the Aeromotive 340 fuel pump. Mark and drill mounting bracket holes using the bracket as a template (See Figure 1). _____ ____ So first. I took the top back off of the carb and adjusted the floats to 5/16. I have a fuel filter then pump then a low pressure Holley regulator set at 4. I have run the vent line back to the fuel tank using a new 5/16 hard line. Wide open throttle is not too bad I don't think. The PF4 fuel pump connector is connected to the relay connector properly - theres bo way to screw that up. This system has less than 100 miles on it. I noticed the front chassis rail was wet with oil and finally tracked it down to the two vent holes in the top of the fuel pump. It was the 1st generation. It still does the same thing. 3-6 psi needs to be achieved whether it be with an after market fuel pump(e. A stock AC Delco mechanical fuel pump is designed to put out 5-1/2 to 6 psi. It was a bit noisy. I have run the vent hose outside of the car for now into the filler neck. Fairly new DanChuck TriFive tank with internal pump. The fuel pump was to match up with my Edelbrock 2401 intake, and Edelbrock 1406 carb. For those reasons I switched to a walbro pump that produces 255 liters per hour. On my 347 i have Victor series Racing fuel pump by Edelbrock. Use at your own risk. Better than a carb, but has issues. Upon examining the carb I find that with the design dimension of 17/32 inch ,which is the dimension from top of the pump shaft to the air horn top in the rest position in the middle linkage Aug 5, 2018 · The O2 sensor will still display the air/fuel ratio. Nov 17, 2021 · Out of the blue the fuel pump stops working. Feb 1, 2022 · Without electric harness connected, have cranked engine several times to fill sump fuel pump, my sump pre filter is empty, tank had 2 gallons fresh gas poured in, took 2 gallon tank back to station and have at least 4 gallons. When key is in the on position, fuel pressure reads only 3 PSI, but I have it set to 4 PSI. Edelbrock says to use 7/16, but I'm not sure that's the problem. Assemble the bracket and fuel pump. After installing the fuel pump, run the engine and check for fuel leaks and proper operation. However, the OEM one has 3 fuel lines, inlet, outlet, and return line, however, the 1721 only has the inlet and outlet line. Aug 3, 2008 · My second electric fuel pump quit and left me stranded this evening. To help prevent the above. Maybe the bad reviews for Airtex pumps are for the electrical fuel pumps and not the mechanical pumps. The inlet check valve in a mechanical fuel pump will prevent this. After each adjustment take a test drive to see how it effects how the motor runs. Then the discontinued it. The pressure does drop down to six at full throttle, which means I can't use a regulator beacuse they need Dec 7, 2018 · Just use the two wires supplied for the fuel pump and wire it just like the diagram shows. 3. the problem is it has died twice and I am on the third Edelbrock 1301. Thanks! Jun 10, 2024 · Even new pumps had issues. Jan 1, 2021 · I’m running a 100 amp alternator. The Edelbrock Tech guys (and you guys) had me on the right track and I needed to put some miles on the new 460 with ProFlo4. Sep 8, 2022 · I am thinking of installing the latest mini Edelbrock in line electric pump model number 17301 AS WELL AS the original AC mechanical pump to fill up the carb float chamber and then switch the pump off when the engine starts up. May 8, 2024 · I'm in the process of planning my Pro Flo-4 build and i have a question regarding using an in-tank fuel pump (using the edelbrock in tank fuel kit for a ford 302 style gas tank in my factory five roadsrter). Nov 26, 2012 · I have an Edelbrock 1791 120gph pump. then get a 1996 vortec 350 pump for a c3500 and its plug and play on the 87 sender . The "internal drive circuit" for the fuel pump was most likely over driven. It requires approximately one amp average draw at maximum delivery and works on 12 Volt negative ground systems only. The very first thing to mention is this carb will not run well, if at all, with stock fuel pressure. Sep 3, 2024 · New to the forum and new to the pro flo 4. GM specs for my car are 5. So what I did. Sep 18, 2021 · I disagree with his opinion on this because per the manual it states that the edelbrock system can support a fuel pump with 10 amps or LESS of draw. Mar 25, 2016 · However, if something I say is wrong or you want to add please do so. Only use the factory wires to activate the relay. Bubbles would indicate a 5. And it still didn’t start. According to Edelbrock, the 1721 puts out 6 PSI of pressure max. I drove it to a local cruise 10 miles away. Engine runs great and will restart quickly when shut off and restarted within a short period of time. 1K views 14 replies 9 participants last post by BPOS Jun 17, 2004 Jan 9, 2014 · Edelbrock HP 61 mechanical fuel pump 01-09-2014, 10:28 AM You need to have a funky riviting machine to rebuild fuel pumps. Remove the fuel line, carburetor side and fuel tank side side of fuel pump. Most Edelbrock carburetors have an accelerator pump linkage that can be moved to different holes to get either a higher or lower fuel shot when the accelerator is pressed. They feature a durable, simple design that reduces the chance of vapor lock and flooding. See below pics. The long fuel trim is almost always in the red at -29%. Jan 26, 2019 · Problem was a vapor lock issue when the truck idles for 10-15 minutes, the fuel gets way to hot in the sump pump (edelbrock 36031). You don't have to connect a PC to the system. Mar 14, 2021 · Replacing a part that is overdue for a change!Amazon Link:https://geni. Oct 12, 2020 · I've got BBC from a '69 Chevelle in my early Chevy II. • Torrance, CA 90503 Tech Line: 800-416-8628 • E-Mail: Edelbrock@Edelbrock. It's a 350 CI motor with a Holley carb. Jul 31, 2024 · Adjust The Accelerator Pump. Thanks for any help Oct 13, 2023 · The carb does not create vacuum to the fuel line. 5psi. This is a fairly new unit. Should be 4 to 5 lbs. I’m having problems when I’m running , the engine starts bogging down to eventually die out I can throttle it to keep it running sometimes but usually it ends up dying after I come to a stop. Determine the new fuel pump mounting location. My question is, I already have a painless relay activating my existing external fuel pump for a carb setup (relay is over Apr 22, 2021 · Drain back of the fuel in the FUEL LINE ONLY is possible with an electric fuel pump. Jul 22, 2019 · The Pro-Flo 4 is different from typical convention because it turns the fuel pump on and off via a switchable lowside (ground). Nov 23, 2011 · The accelerator pump could be the problem if you're having a flat spot or bog right at the hit of the throttle. I have run ele fuel pumps on various cars for years and as I recall most run hard till pressure builds then quiet down after hitting max pressure. The problem happens after a hot engine sits until it cools. My edelbrock fuel pump relay and power line gets really hot. There is NO troubleshooting information in the manual. Remove the fuel line, carburetor side and fuel tank side of fuel pump. I even posted a similar question here on Chevytalk, but no one had heard of such a problem. The pump must be mounted below the fuel level or pickup tube inlet for the pump to prime properly on startup. The fuel pumps are easy to install and operate quietly, so you won't know they're there! 2 days ago · Hey guys I’m new here , I’m running a 15’ panther with a 540 Lycoming. Really baffled by it now. bad install. The fuel pumps have a unique valve design that improves flow quantity and quality, and can support engines with up to 550 horsepower. The fuel in the bowl, feeds fuel to the accelerator pump by gravity, from the float bowl to the accelerator pump chamber. Jul 18, 2014 · These pumps should be mounted as close to the fuel tank as possible, at or below the fuel level. I went through two Edelbrock pumps before I gave up and went electric. Order online or pickup at your local AutoZone store. I am now looking to build the fuel system. Aug 21, 2023 · That Holley fuel pump is junk. 5 PSI. I have been experiencing stalling issues coming to a stop or taking off from a stop and my mechanic did some testing and has seen that the fuel pump is losing ground from the Pro Flo module. The fuel pump supplies pressurized fuel to the carb. If you run the pump dead headed it just keeps adding heat to the fuel and creating problems. These would route into a Corvette LS return style fuel filter, that would put out 58psi output and return any excess fuel back to the tank. Nothing can be done on the new pump for having the inlet/outlet housings and 9/3 orientation. Some of the causes, not in any order. I have a couple different ideas and want to see if there are any issues with either one. Or a O2 sensor issue. Mar 8, 2021 · Looking for a little help with Fuel Pressure. 4-7 PSI, 38 GPH for most carbureted applications and is compatible with gasoline and E85. There are 12 screw holes on top of pump body, but only 6 pre-cut holes in perimeter of rubber diaphragm. A bigger, hotter pump would be a Feb 2, 2013 · Looking for a rebuild kit for an Edelbrock 1721 (small block Chevy) six valve mechanical fuel pump #1799. I have pacemaker ignition, new Nov 14, 2024 · put the new Zettle relays in today. No, the pump can not be upgraded. I have the red Edelbrock electric feeder pump right outside the fuel sender ( no it cannot go below the tank on this car) . Then you have the problem with the Aug 22, 2023 · Is there an in-tank fuel pump module offered by Edelbrock to go with the Flo Pro 4? I once had a frame mounted high pressure pump with return line feeding my Fitech EFI. Jan 30, 2022 · If you can get this Edelbrock 1797 Bottom Feed Fuel Pump Mounting Kit, 3/8 Inch NPT it should help solve your problem. NOTE: Edelbrock recommends the use of a primary fuel filter (not included) placed in between the low pressure pump and the fuel sump inlet. Jul 3, 2019 · I have an Edelbrock 1721 fuel pump on my 56 Chevy. bonus feature when using separate relays = much easier to jumper the components for testing. This usually points to issues with fuel pressure, injector sizing, or air-fuel ratio (AFR) targets. 5 but I've also read between 5 and 9 is perfectly safe. It is running fine but I thought I'd try and prepare for the day that it acts up. all this gets you factory simple and super common parts . Occasionally the accelerator pump’s arm adjustment to richen the circuit can cause a lazy pump condition (the fuel is Feb 6, 2024 · Just played with this just yesterday With the transfer slots squared away as supposed to be, vacuum is under 15hg, the vacuum gauge needle isn't steady, and the acceleration is sluggish and stalls if I press too hard on the gas pedal, no matter how much I adjust the idle mixture screws or advance the timing rotating the distributor counterclockwise without turning the idle speed screw to Dec 27, 2016 · The AC Delco electric pump put out 8-9 psi and idled off all eight barrels and maintained 2 psi above 4500 RPM. I would go from the 58'ish to 9-10lbs. This was done to allow PWM'ing the pump inside the Edelbrock fuel sump. Jun 10, 2015 · My engine is a mildly cammed 385HP 350 crate motor with an Edelbrock 1901 carburetor, a Carter P4070 electric fuel pump, and braided copper fuel lines. com (1) Diaphragm and Pull Rod Assembly Aug 16, 2000 · I've got an Edelbrock 1721 fuel pump on my 383 that I am installing in a 67. but I don't Feb 28, 2024 · Last weekend infinally sripped the battery in place, and so far wverything is great other than not getting any power to my fuel pumps. NOTE: The fuel pump is directional as marked on the mounting bracket. Hot vapor also vents back to the tank. Not sure if temperature is causing the issue. This creates some difficulty though with trying to pair with a pre-made fuel pump relay kit. The 8123 came with a blue anodized elbow which has -6AN threads on the side that connects to the fuel line, and it has 1/4 NPT threads on the side that goes to the fuel pump. 1975 Chevy k20 with the Pro flow 4 XT if that matters. Edelbrock universal micro electric fuel pumps are designed to deliver maximum performance in a compact package. The higher the hole is on the linkage, the leaner the shot will be. I put an electric fuel pump back by the tank to prime the system, use a switch on the dash. I have a new mechanical fuel pump, feeding an Edelbrock Sump which is mounted next to the radiator on the radiator support panel. [/QUOTE The pressue differential is so little that it happens over a period of time. Diagnostic screen has all green lights. Aug 8, 2013 · Airtex claims to be the only American-Made fuel pumps. Might take the ECU to a phone repairs place, and see if they can replace the driver IC. All fuel pumps are for gasoline only. New pumps are especially suspect. This is the second time this fuel pump has gone out. 4. ( 1715 and part no;s similar. In a nutshell: Most installs will work fine with the base map. Apr 15, 2017 · Buy Edelbrock 17303 Fuel Pump: Electric Fuel Pumps - Amazon. BG also sold a pump with a vent tube in the upper body area but the body of the pump was much more robust then any eddy pump sold. Specs: stock zz4 385 with about 500 miles on it. The orange and tan fuel pump wires are run into a relay, out of the relay is a single blue/yellow wire which I am assuming goes to my fuel pump. Problem solved Dec 21, 2024 · 2. Apr 9, 2009 · The fuel we buy is the problem. I Have Edelbrock Universal Fuel sump fed from a mechanical fuel pump. Make sure you run a separate fused 12 volt source to the relay to power the pump. The orange wire is getting 12v to the pump when switched on. I come to find the low pressure fuel pump had already burned out (as well as struggling to provide enough constant flow). Went looking for the Edelbrock rebuild kit#1799 and quickly found out this model is discontinued. REQUIRED PRODUCTS Related Products. If the motor is acting funny. It's been mentioned that a return line will cool the fuel. Mechanical fuel pumps can range from 5 psi to 12 psi. Gasoline doesn't run uphill (fuel valves are ABOVE the fuel). The 1721 has one in and one out. What do you think. My question is what can cause the vehicle to suddenly shut off and not start but Aug 25, 2021 · I recently put a PF4 system with an Edelbrock Sump pump for fuel. Made my own up with PTFE fuel line, an adjustable bypass fuel pressure regulator with a vacuum reference, and the GSL392. No rebuild kit is sold for the old style Dec 15, 2004 · It does look like the majority of the marine fuel distributors in NY have a clue, and are selling ethanol-free. Wix filter 33482 is what I'm using on a Pro Flo 3 system. System 1: Dual EFI baffled fuel tanks using internal Walbro 255lph fuel pumps. Upper Fuel Pump Body EXPLODED VIEW OF EDELBROCK FUEL PUMP Lower Fuel Pump Body In Proper Valve Installation for “Outlet” Side of Pump Pulsator Cover 14 1 3 4 2 6 7 5 13 12 11 8 10 9 Edelbrock Corporation • 2700 California St. After getting several small bugs worked out I took it out test driving and discovered that after a few miles the fuel pressure just drops out. So I am thinking I am going to have to use this Airtex pump. Gave the Carb to me. I have installed the Edelbrock fuel pressure regulator on the return side, followed instructions as to NOT connect vacuum line until correct pressure of 43 psi is reached. Jan 8, 2012 · I typed in "Edelbrock fuel pumps leaking oil" into google and there are heaps of people who have bought these early type mechanical fuel pumps only to have the same problem of oil spewing from vent holes. It is a bit more pump than I needed, since the 340 produces 340 liters per hour of fuel and the pro flo only needs 255 liters per hour. Apr 9, 2024 · I recently purchased a 1971 Bronco with a 302 with Pro Flo 4 and Edelbrock Adjustable Fuel Sump System. It's dribbling out so much fuel that the idle screws do nothing. If leaks exist, stop engine immediately and correct any leaks BEFORE any further engine operation. 87 tbi sender MINUS pump . Problems: Cannot set the idle RPM to 650. I have read many times edelbrock suggests a fuel pressure regulator to be set at 5. Edelbrock is not open on Saturday to call and inquire. com Mar 25, 2016 · Either way a fuel pressure gauge needs to be installed and read 3-6 psi or you WILL have a flooding condition! Even though edelbrock carbs are very simple it takes time to tune them properly. Most fuel pumps are turned on/off with 12v but Pro-Flo 4 turns the fuel pump on/off with ground, not 12v, because our ECU has the ability to PWM a fuel pump. The fuel pump I am using is the one in the link below. I found on mine (Edelbrock 1406) that using a off the shelf GM mechanical fuel pump was putting out 10psi until I regulated it at 5. Most all in tank fuel pumps are over 10 amps. Here is the quote i found a few minutes ago which is one of many with the same problem. Car smells VERY rich. Typically my fuel pressure is between 55-60 psi. com FREE DELIVERY possible on eligible purchases There was a problem filtering reviews right now Apr 7, 2015 · Carb: Edelbrock 1406, about a year and a half old. Apr 5, 2020 · He looked on the interweb and decided that the carb pump rod was the problem as the fuel was bubbling out of there. Bought a knock off rebuild kit, put that through it, same problem. Maybe less than 50. Use a separate relay for the fuel pump. I called Edelbrock and they informed me that the old pump was discontinued and new manufacturer is in place for the 1721 pumps that are out now. When I fire up the 56, my fuel pressure gauge reads between 8 PSI and 8. May 15, 2014 · There should be no Fuel Pump Relay or Fuel Pump Relay Harness used with the Returnless Fuel System. 5 psi . Pro/Cam pumps by Baker engineering is about the same quality as the BG pump. Ether the fuel return line ( if the engine mounted pump was using the return line. For anyone wondering im using the msd inline pump #2225. I always advise guys to get the timing curve sorted out, THEN tune the carb. I decided to use the sump to avoid purchasing a new fuel tank, now learned I didn't have to. May 18, 2021 · I have a Edelbrock 1405 Performer carb that has a less than strong accelerator pump discharge. I have the 17401 regulator. The GSL392 is the same EFI fuel pump Edelbrock uses in the inline EFI fuel pump and regulator kits. EXPLODED VIEW OF EDELBROCK FUEL PUMPS (1) Diaphragm and Pull Rod Assembly (2) Pulsator Diaphragm (3) Diaphragm Spring (4) Mounting Gasket (5) Valve Sep 20, 2020 · I bought a Edelbrock fuel pump ( part# 17303) with a max of 3. Re: Edelbrock Fuel Pump Problem BBC 05-01-05 11:01 AM - Post# 685358 In response to pick8208 I'm actually glad to see that this has happened to someone besides myself. edelbrock. The pump would run until the fuel pressure reached 8 psi and then the pump would shut off. After driving the car. Cools down about 5-10 minutes and will prime and go again 1-2 miles. but it is carbureted at the moment. In the manual it shows the orange and tan wires for the fuel pump wiring. ) Or. Thought it was vapour lock and rerouted the line but it keeps happening. I'd just wire the pump like a carburetor. I was informed these pumps are not made for the vehicle to idle that long. No rebuild kit is sold for the old style Sep 18, 2020 · With the sump mounted in that location the fuel line lengths are just about as short as you can get. I’m running the edelbrock fuel sump and the stock fel pump is feeding it. 0-6. Jun 24, 2012 · Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. While accelerating I have a pro-flo 4 kit and edelbrock efi sump fuel system on a sbc engine. It works great with the pro flo 4. Sometimes this can rinse out the needle and seat if something was caught in it. Possibly by a pump going bad. Nov 9, 2012 · So I spent $2,489 back in September 2015 on Edelbrock's "New" E-street TBI fuel injection. That allow the ECU to control the fuel pump speed based on fuel pressure. The specs for their replacement for my car indicate fuel pressure of 5. When I had my 496 built in 2018 it was fitted with a brand new Holley mechanical pump. I just installed a new AC Delco electric (diesel) inline fuel pump this morning. This means you can only clock bottom of pump in 2 hole increments if you want to catch a diaphragm hole for the screw to pass through. Attached are pictures of my wiring harness. Fuel pressure looks perfect. I used the two wires to run the relay. It is my first efi system so I'm a newbie. The problem is with the fuel lines. It never keeps the same fuel pressure, and it's not vacuum referenced. They have six valves and a free-flow capacity of 110 gallons per hour. (-5-6%) I actually have room to correct that with the fuel modifier, I think. Fuel Pump: Electric. Hardly ever happens tho. The hot vapor will not let fuel into the sump. In Feb 5, 2015 · I need to clock their 1721 mechanical pump to clear crossmember. I was using the fuel sump kit bit I don't remember if the included filter was the same part # that I'm using now. I bought it and a rebuild kit almost seven years ago when I was building my 34. Apr 20, 2009 · This ball has to be in place for the accelerator pump to shoot the gas into the carb but when stuck does not allow fresh fuel in after the pump does its thing. You can only use that fuel pump with a vacuum referenced fuel regulator at 43 psi. Replace it with a pump that does not use a return line. Problem: 1. But last weekend after doing about 1 hour of errands on stop The slot allows fuel to enter into the pump well, replenishing its fuel supply. If the edelbrock coil gets released in the future, I'll probably install that instead---not that it matters between the two. Replace existing fuel lines as necessary for proper fitment. Fired up and ran fine for a couple of hours then totally died on me. Edelbrock Universal Micro Electric Fuel Pumps. 5 psi. It features an in-line style rotor and vane pump design. Never had an issue with my other electric pump. Aug 9, 2024 · Could be too much fuel pressure, a bad needle and seat, or something stuck in the needle and seat. 15 psi. Edelbrock offers rebuilding services for Quiet-Flo fuel pumps - call for more information. Nov 23, 2005 · The Edelbrock Performer Series Street Fuel Pumps are designed to match the Performer Series Carburetors. Had front of truck on car ramps, took it off in case it was making fuel pump too high for gravity. Mar 23, 2021 · After putting gas in, the fuel pump would not prime and the engine would not start. Had issues. I just purchased the pro flo 4 for my sbc. All of the service parts to re-build them are still avialable. Run a relay you will be better off. Jan 30, 2022 · Edelbrock Part #1725 Performer RPM Series fuel pump is for 289-351W Ford designed for use with all Edelbrock carburetors used in Performer or Performer RPM applications www. 38 per gal) over the cost of regular. Replaced both the main relay to the ecu and the fuel pump relay. Changed the entire fuel system, line, filter and added a Quiet Flo 1791 electric pump and now have the problem of stalling occasionally because of lack of fuel. Check items to add Edelbrock part number 1721 Performer RPM Series fuel pump is for Small-Block and "W Series" Chevrolet designed for use with all Edelbrock carburetors used in Performer or Performer RPM applications. I put the Pro-Flo 4 on a 350 small block and I recently started losing fuel pressure as I accelerate. 10 per litre (0. Bad float – heat some water and immerse your float. May 24, 2016 · When I took the line off the carb there was no fuel. Show cars want to keep the pump tucked away high in the chassis so it's not unsightly,, and run a nice tight little bundle of wires Jun 11, 2021 · The 10a pump circuit is being dedicated to switch a separate pump circuit to switch 86 and these switch at high resistance (usually 125-150ma draw) -so- the same key source that powers the ecu would power the separate Pump relay -vs- the orange lead on the pump harness that comes out of the other Bosch relay (not the ecu). My problem is low fuel pressure, when I put in the specs for engine it needs 58 psi, engine cold it has 55,56 psi, warm it has 32 psi. Fuel Delivery and Air-Fuel Ratio Problems Running Too Lean or Too Rich Under Load. 5 psi, but my fuel system is designed for a return style regulator, so I can raise the pump pressure back at the pump and use the regulator to tune the final pressure. You can search under Autopulse, Dupree, Airtex, AC Delco, Mopar or even just electric fuel pump onyur favorite auction site. Nov 9, 2021 · After running some time it's 120 degrees at sump housing. When the accelerator pump’s plunger is Jun 4, 2020 · Hello y'all! I have the Pro Flo 4 kit for my 302 (#35940) as well as the fuel pump kit #3604, and it seems that when I'm cranking so start the engine, my fuel pump is not working. I've been adjusting up the pump shot and have it up to 65% increase Feb 21, 2018 · Will do, what can cause fuel pressure to suddenly be higher with a mechanical pump? This problem just appered out of no where. Mar 11, 2019 · I had a Stewart Warner 240-A electric fuel pump on my 1955 Chevrolet with a 1970 Pontiac 455 engine with two Holley 4224 (660 CFM each) center-squirter carburetors with straight linkage. The pump must also be within one foot of the fuel tank as it’s designed to push fuel from the May 11, 2021 · Hi, I have proflo 4 system paired with edelbrock performer RPM mechanical pump and Edelbrocks EFI fuel sump system on my 69 barracuda with SB 426 stroker engine. I switched to in-tank because of the noise and especially because of vapor lock problems towing in hot weather. A few weeks ago my truck put me on the side of the road. I can monitor data when trying to start, and I see the fuel pressure dropping to 0PSI as soon as I try to Jan 4, 2024 · My idle fuel modifier is at -30% and I still get readings of -15% short fuel trim. The very first thing I do in this situation is pinch off the fuel line with the engine running, and when the engine starts running out of fuel I unpinch the line. fuel pump configuration, additional fittings may be required. or if you need more fuel volume get a bigger lph pump the same style . Also. In Diagnostics the Jan 20, 2012 · Question: I purchased an Edelbrock 1721 fuel pump to replace the OEM pump on my 350 small block in a 1979 Corvette. and letting it warm up to operating temperature180*--190*. The line to the mechanical fuel pump is also a new 5/16 hard line, with a hose to the sump. Or this could be timing. Rebuild kit for Edelbrock fuel pump #1791, 182051, 18052; Product Attachments. Jun 11, 2004 · which fuel pump, edelbrock 1711 or 1721 Jump to Latest 9. When at constant speed the fuel pressure builds back up. I thought no problem, I'll just get a 3/8 NPT to 3/8 barb 90 degree elbow and be set. 1795. The car is used as a daily driver on dry season, the setup ran fine for several months, around 2k miles. My fuel pump pulls a max of 5. No sucky from fuel line . . Got the shits and bought a new 650 AVS style edelbrock and the problem was gone. The multiple pumps were OE for some higher end cars like Duesenbergs and such. For proper installation and voltage requirements, use fuel pump relay kit No. This pump runs sounds the same all the time. My problem is looks like the gaskets are leaking some and getting worse. Fuel pump works fine and is providing pressure. This pump has integrated 5/16 barb Engine Mods - 1721 edelbrock pump pressure to high - I'm using a 1721 Edelbrock fuel pump which Eledbrock claims puts out a maximum pressure of 6 psi. I have an intank pump and pressure gauge installed on the input side of fuel rail before the fuel pressure sensor. The Edelbrocks are very reliable, and easy to tune. The issue that left me stranded was fuel pressure. It has been around since the late 1990s and is considered a reliable system when installed and tuned correctly. I am wanting to do the pump in tank. then used AN to push 2. edelbrock 1721) or a regulator. Get the best EDELBROCK Universal Fuel Pump products at the right price. The edelbrock kit should have zero problems supporting this pump without a relay. The inlet fitting is a normal warm temp and the output going to the fuel rail is extremely hot. See full list on theautoinsiderblog. If I'm paying premium price, I had better darn well be getting premium fuel! LOL EDELBROCK CARBURETORS AN OFTEN OVERLOOKED ACCELERATOR PUMP ADJUSTMENT *This is a compilation of knowledge sourced from experience, automotive industry practices and technics. Running a 8-10 foot long 14 or 16 G wire to run the fuel pump,,, is typically why you see these morons sitting on the side of the road with a burned up pump. There is only one Relay that controls the ECU Power, that relay will have no effect on the Fuel Pump function. I tried several things, including disconnecting the battery and letting it sit for a few minutes. The inlet is on the back of the pump and is a 3/8 NPT female inlet. Feb 17, 2022 · My mechanic said the mechanical fuel pump is not making contact with the cam shaft to make the fuel flow so he switched to an electric fuel pump ( EDELBROCK 1301) he placed this on the lower part of the front fender near the firewall. Jun 6, 2022 · When I put it in gear it dies. Hard to drive up to the pump there, though!:mwink: Premium fuel here, BTW, costs about $0. Changed it, same problem. May 21, 2019 · The edelbrock fuel sump kit comes with an in-line filter that has 3/8" barbed hose connections. These high-performance's street Fuel Pumps feature a high quality three stage Besides I run my fuel pump off a relay, so it's running at 100% anyway. Whether you are looking for a street performance or an all out race mechanical fuel pump, Holley has the pump you need. Feb 21, 2018 · Will do, what can cause fuel pressure to suddenly be higher with a mechanical pump? This problem just appered out of no where. But it's up to the owner to make the fuel modifications to the systemlike adjusting the Global settings, and cold start enrichment to the base map. Jun 9, 2021 · Hey I'm having a problem with throttle response with my ProFlo 4 system on my 331 SBF. Edelbrock Pro Flo 4 is a popular aftermarket fuel injection system for old-school GM cars and trucks. Feb 2, 2013 · Looking for a rebuild kit for an Edelbrock 1721 (small block Chevy) six valve mechanical fuel pump #1799. -6 feed and return lines. Not melting nor I notice any issues with how the car runs. I don't use the Edelbrock kit. My HT383 Most vehicles since the 70's have 1 or 2 lines going back to the fuel tank that can be used for this purpose. i did my own lines in nylon like late model uses from the tank to my fuel rails . When i converted to fuel injection. Edelbrock part # 17301 fuel pump is a gravity-fed type pump with a simple 2 wire design. Even my factory 2002 GM LS has a jumper terminal in the fuse box, just for the fuel pump it's used to prime the fuel system after fuel pump replacement. If using a low pressure (7 PSI MAX) electric fuel pump, the fuel pump output will route and connect to the sump inlet fitting. Going to the next issue. Fuel coming out of carb at linkage points on auto choke side. I started the pump and fuel flowed so I figured it was a vapour lock. But still no start… I attempted to start It with the fuel pump linked out and running constantly as well. As many of you know there is not a lot of room between the back of the pump and the motor mount pad. Running the motor at idle speed, but never letting it run up to temperature. Jul 4, 2023 · Hello, I just installed a pro flo 4 #4150 style EFI on my 302 (part #35930). They came out with a second generation. Many aftermarket fuel pump relays aren't wired to jive with how Pro-Flo 4 works. udsv nzhrq kkasd tqkyh zaizpvo fvuouvd npck unrfwb fthmn cwbuj