Question about 1994 Honda Accord

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Car will loose fuel pressure every few minutes. switching the key off and on will restore fuel pressure temporarilly. we replaced fuel pump wasnt the problem

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Check the pipes havent collapsed or trapped and partially crushed

Posted on Sep 11, 2010


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Hello,am having problems starting my ford focus early in the morning,l need to turn the key twice to get the car to start the problem also occurs at times when the engine is hot,

I think that the electric fuel pump is bleeding off pressure due to a failed pressure check valve inside the pump outlet. You will need to watch the fuel pressure on a gage, after approx 20 minute with the engine turned off it should not loose more than a few PSI, if it does and the gage connection is leak free then you must remove the fuel tank and replace the fuel pump module. The test port for fuel pressure is in the supply rail to the engine fuel injectors, the gage is about $20-$30 US

Jun 03, 2016 | Ford Cars & Trucks

1 Answer

How do i see that my fuel pump is bad?

  1. Discharge the pressure in your fuel system by either removing the fuel pump fuse or disconnecting the inertial cutoff switch and starting the car, allowing it to run until it stalls out. Then turn the key off, remove the key, and let the car sit for a minute or more.
  2. NOW REPLACE YOUR FUEL FILTER (This will save time later.)
  3. Attach a fuel pressure test meter to the test port on the fuel rail.
  4. Insert your key and turn the key switch from OFF to ON (not "START" but ON) three times, holding it at OFF and ON for between 1-2 seconds each time.
  5. Return the key switch to OFF
  6. Look at the fuel pressure gauge. It should read at least 35 p.s.i. (minimum), and should HOLD that pressure for at least ten minutes. If it does not hold the pressure, DISCHARGE THE FUEL PRESSURE again as described above, and REPLACE THE FUEL PRESSURE REGULATOR.
  7. RE-PRESSURIZE THE FUEL SYSTEM AGAIN (the key switch off & on thing above), and then start the vehicle normally. Look at the fuel pressure. Is it at least 40 p.s.i.? YES? Good so far. NO? Either the fuel pump is bad, you have a fuel leak somewhere (should be obvious), or the fuel pickup strainer in your gas tank is clogged.
  8. TURN THE KEY BACK OFF, and be sure you're retaining pressure. If the pressure begins falling immediately, suspect either a stuck injector (would make the car run rough and the "CHECK ENGINE" light stay on), or a defective check valve at the fuel pump (which means you need a new fuel pump).
  9. If the pressure fell with the key off, turn the key back ON. Does the fuel pump have to run for more than 3 seconds to regain full pressure? If so, either your fuel pump is bad or your fuel strainer is clogged. Either way you will need to pull the pump and strainer out of the tank to check.
  10. If your strainer is clogged, your pump is probably fine... just replace the strainer. If the strainer is clean, your pump is bad. Replace your pump.
  11. DON'T WASTE TIME TRYING TO SAVE THE GAS IN THE TANK. I guarantee it is contaminated with water, rust, and other garbage. DISPOSE OF ALL REMAINING FUEL IN YOUR GAS TANK, AND REPLACE IT WITH NEW FUEL.

Jul 20, 2014 | 2005 Pontiac Vibe

1 Answer

Gm Troubleshoot I have no fuel pressure with a replaced fuel pump, fuel filter, fuel pressure relief value, and a new oil pressure switch. When I replace the oil pressure switch the 2000 z71, 5.3L started...

Check the fuse and fuel relay. Relay is located in electrical center under the hood on the driver side. The relay and fuse legend will be on bottom side of the protective cover. You can test it by exchanging it with another relay that you know works, (horn relay, etc.).

With the key OFF, listen carefully for a slight whirring / buzzing sound for 5+ seconds or so when you turn the key to on / run. This sound is the fuel pump running. If you hear it run, then it is most likely pumping fuel - but is blocked somewhere (crushed line?). You could disconnect the fuel line to verify fuel delivery while the pump is running if you need to. If you don't hear it; check for 12V + and GROUND at the pump. Remember, the pump only runs for a few seconds when the key is in the run position with the engine NOT running, so power will be there for a few seconds only. Check for loose / poor (+) and ground lead connections as they can cause this problem too.

Good luck!

Sep 17, 2013 | Cars & Trucks

1 Answer

1987 honda crx fuel pump problems

have you checked how much fuel pressure you are susposed to have. My jimmy requires 125 to 150 psi the fuel pump whines all the time or as it cycles. research how much fuel pressure you are susposed to have. then go on from there.

May 27, 2012 | Cars & Trucks

1 Answer

1993 jeep takes long time to start after turning key on have changed gass pump have put new fuel pump module in fuse box when fuel pump was replaced it started good for a few days

have the key in ignition turn off all excessories so you can hear,turn key to on postion listen to see if pump is working,sounds like a power anttena noise,if you hear this,then have the fuel pressure regulator checked,as could be loosing pressure,causing the hard start issue,or the pump could be bad,listen to car,then go from there.

Sep 02, 2011 | 1993 Jeep Grand Cherokee

2 Answers

My Chevy 5 cyl. Colorado stalls after going just a short distance. This happens after it sits over night. I tried turning the key to on for a few minutes before starting with some success. After it stalss...

Seems like the fuel line looses its fuel or something. ????? That would cause a no start or hard start problem . Your best bet , have it diagnosed by a repair shop . That is unless you want 20 different answers on here . Are you willing to replace parts your vehicle doesn't need . Testing is the only way find the problem , not guessing , that's all you'll get on here . Hooking up a professional type scan tool an checking sensor data parameters to see what is a miss . Doing fuel pressure testing ,hooking up a pressure gauge .

007 Idle Speed Problems Scan Data for Idle

Oct 08, 2017 | 2005 Chevrolet Colorado

2 Answers

I was accelerating the other day and all of a sudden my car starts bucking and losing acceleration. After about a minute it dies completlely. I wait a few minutes and try to start it and it starts barely...

A few Ideas from the 1995 Nissan Sentra maintenance manual - Troubleshooting section

Priority Action Part Type Cause
1 Inspect Battery Battery Discharged or Faulty.
2 Inspect Battery Cable Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
3 Inspect Distributor Cap Distributor Cap Cracked or Burned.
5 Inspect Coil - Ignition Faulty Ignition Coil.
6 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter Starter Motor Faulty.
9 Inspect Fuel Pump Low Fuel Pressure.
10 Inspect Solenoid Switch Faulty Starter Solenoid Switch.
11 Inspect Relay - Fuel Pumpat Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive Faulty Starter Drive.
15 Inspect Fuel Injector Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank Fuel Tank Empty.
19 Inspect Carburetor Carburetor Flooded or Faulty Choke.
20 Inspect Distributor Worn, Loose, or Incorrectly Installed Distributor.

Mar 26, 2011 | 1995 Nissan Sentra

1 Answer

Car wont hold pressure in fuel lines..


Mar 20, 2010 | 1996 Oldsmobile Achieva

1 Answer

2003 Expedition hard to start

HI ' sounds like a liking fuel pump check valve ,to test install a fuel pressure tester follow instruction on tester ,turn key on don't crank engine over turn key off and back on again note your fuel pressure should be 38 psi to 48 it should keep 20 psi in system after 10 minutes of just siting replace fuel pump if you loose the pressure

Sep 23, 2009 | 2003 Ford Expedition

2 Answers

1997 Jeep Grand Cherokee cranks but won't start

Same thing happened to me at about 140k. It was the fuel pump. Best way to test if your pump is failing and loosing pressure is to see if the car will start immediately after it has been running, or turn the key to the alt position for a few minutes before starting. If your engine fires faster after it has been running or the key has been in the alt position you will probably need a new fuel pump. Great news is with a very deep socket to get the tank straps off its a 30 minute job to replace the pump/filter assembly.

Dec 17, 2008 | 1997 Jeep Grand Cherokee

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