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1985 comoro starts up but dies after a few seconds has a new fuel filter and fuel pump 47 pounds of fuel pressure at fuel rail pressure regulator holds vacuum

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Check the exhaust and see if it is either plugged or partially plugged. If so it puts back pressure on the engine and will not allow the fuel to go into the cylinders and fire.

Posted on May 06, 2017

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Posted on Jan 02, 2017

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Chevy tahoe 1999 now it starts but runs for a few seconds then i wait it starts and run for a few seconds again


Seem's like your fuel pump isn't able to keep the good fuel pressure.

Might be a good idea to check your fuel rail pressure. I assume that it drops before your engine dies!!!

If fuel pressure is ok in your rail, try cleaning the fuel rail and injectors. Sometimes dirt can go from a trashed fuel filter an clog yor rail or the injectors.

Jan 27, 2014 | Chevrolet Chevy Cars & Trucks

1 Answer

Was having trouble with my 1998 GMC 1500 5.7 with it dieing would restart and run for a few but got worse dieing and not starting so i took it in for a diagnostic test they said it had low fuel pressu


The fuel pump in the gas tank and the fuel pressure regulator are what controls fuel pressure-the pump builds pressure in the lines and the fuel rail on the engine, and when pressure is correct the pressure regulator keeps it constant by controlling the fuel return line from the fuel rail to the tank.
If your fuel filter is clean and not plugged, it sounds like the pump or the pressure regulator needs to be replaced. Even though the pump is working, it may be weak and failing. Some vehicles have the FPR inside the tank with the pump-You will have to check where yours is located. If it is located on the fuel rail, it can be checked to see if it is working right.
Good luck.

Feb 08, 2013 | 1998 GMC Sierra

1 Answer

I installed a new fuel pump in my 95 windstar, still not starting, checked the pressure at the rail and only have about ten pounds of pressure could the regulator be my problem,and the old pump be good?


Its possible.
Could be a dirty fuel filter too.
If you did not change the filter do that next. If you still have low pressure try to clamp off the return line to the tank to check the regulator.
You could have a leaking injector too.

Dec 18, 2012 | 1995 Ford Windstar

1 Answer

Died suddenly wont restart. turns over but wont fire.starting fluid made it start right up till it burned out then died again.fuel pump,pressure reg. ,filter?


Check for fuel pressure, 2.5 is Key on engine running
13 PSI (Pounds per Square Inch)

3.3 engine is 40-47 PSI (Pounds per Square Inch) Key on engine off
31-44 PSI (Pounds per Square Inch) Key on engine running

Jul 23, 2011 | 1991 Buick Century

2 Answers

Crank tolong before it start


First check your fuel pressure regulator by pulling the vacuum line off and check for fuel there should not be any.Then start the car and with a pressure gauge hooked up to fuel rail pull the vacuum line off the pressure should rise 5-10 psi if it does'nt replace regulator.Next check the fuel pressure it should be 41-47 with key on and engine off if not within specs replace fuel pump.

May 02, 2011 | 1995 Buick Roadmaster

2 Answers

BOUGHT TRUCK NOT CRANKING. SPRAYED STARTING FLUID INTO INTAKE AND CRANKS AND CONTINUES RUNNING, WILL DRIVE, TURN ENGINE OFF IT WILL NOT RESTART WITHOUT SPRAYING. i DONT HAVE FUEL PRESSURE GAUGE BUT THERE...


if you have the same problem with the engine Hot or Cold then it may be the cold start fuel injector in the throttle body / carb. may need to be cleaned or replaced.
may be chock and linkage

Apr 05, 2011 | Ford F-150 Cars & Trucks

1 Answer

On frist attemp to start car, cranks then dies after few seconds ckd fuel rail , had no pressure , replaced fuel pump regulator , no help !


do you hear the fuel pump turn on when you turn the key to the run position? If not the check the fuel pump relay.

If the car will start and run for a few seconds then die, It may well be the crank position sensor.

Nov 01, 2010 | 1990 Buick Regal

1 Answer

My 1999 GMC Sierra wont start. It has the 5.3l V8


Sounds like a security problem that is preventing starting. It will run for a few seconds and then die.

Jun 09, 2009 | 1999 GMC Sierra

2 Answers

1992 toyota celica gt 2.2 starts runs rough then dies


Sounds to me like the fuel pump is worn out. They DO wear out. And even though they seem to be working, the brushes in the electric fuel pump may not be contacting all the commutator, thus making the pump weak. It may start the motor but can't maintain normal running pressure (27-35psi). Have you run the car out of gas shortly before this problem surfaced? If you have then it's your fuel pump. It was damaged when the tank ran dry. Even though the pump may seem to be working, it's still badly damaged and needs to be replaced.
Just as Matmenzies has stated, get a fuel pressure gauge and test the pressure. I'd start with a complete check of all your vacuum lines. Check for cracks on the vacuum hose that connects to fuel pressure regulator on the fuel rail. Also, if you can, get a hand operated vacuum pump to check the regulator. If you can place a vacuum on the regulator and it holds, I'd say move on the fuel pump and check it.
BTW, if the fuel filter has been changed, you may want to check to see if it was installed backwards! Some fuel filters are valved and will cause symptoms like this. However, this is an immediately noticeable mistake and you haven't provided enough info for me to say more. I'd pull it and check that it has any flow at all. You could have sucked in a big dirt ball and blown it right into the new filter, effectively stopping fuel flow. Then I'd blow out the fuel lines, just to be sure.
Start with these 2 things and post what you find. We'll go from there.

May 16, 2009 | 1992 Toyota Celica

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