Question about 1990 Ford F150

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No gas changed fuel pump in a 1990 f-150 pump runs but will not start i have good spark is ther a way to prime a fuel injecters

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  • jwbblaq Apr 24, 2010

    Replaced fuel pump, fuel filter, fuel pump runs when cranking at fuel filter how much fuel flow should be coming out of flow end

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Hi! Please check the fuel filter first. IT may be clogged with dirt and rusts from the fuel tank thats why fuel is not flowing even a new fuel pump was installed. Have it replaced. HOpe this helps and have a good one!

Posted on Apr 25, 2010

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Your Initial Start SHOULD INCLUDE (CYCLING The Key from off to the ON Position 4-7 Times) This is the PRIME PROCEDURE you Ask about, Also Do a VISUAL Check With Someone Cranking the Engine If you have Throttle Body Injecters Simply Look For an Umbrella Pattern of Fuel Pulsing out from Injecters.

Posted on Apr 24, 2010

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Car has been sitting up and will not start now. It seems to not be getting gas and I do not know how to prime a fuel injection system. Any help appreciated.


There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

May 07, 2016 | 1998 Mercury Mystique

1 Answer

What do you do if you cant get your 1992 ford f250 to start?


Start with the basics. To run, the engine needs fuel, air, ignition spark, and compression. So one should verify the fuel pump is working and fuel is getting to the engine. When you first turn the key to on, the pump should come on for a brief second or two to prime the lines with fuel. If you don't hear it come on, spray inside the intake with starting fluid or carb cleaner and see if engine tries to start. Does it at least fire and try to run? If so, the pump needs testing to see if it is bad or wiring to the pump is the problem. If the pump is working, the next thing is to check for spark on a spark plug wire when the engine is cranking. You can buy an inexpensive spark tester at a parts store, or just pull a spark plug wire off the plug and hold the metal wire terminal end 1/4 inch from a metal piece on the engine. Use a glove or heavy rag to hold the wire and have someone crank the engine over. To verify ignition is good, you need to see a strong blue spark consistently when the engine is cranked over. If no spark, the ignition system is the problem, and further testing of the system is required. Best done by a well-equipped shop. If pump is working and you have spark, but still won't start, either check fuel pressure with a pressure gauge (correct fuel pressure is very important!), or check that injector circuit is working and injectors are spraying fuel into the intake or into the cylinders, depending if you have multi-port injection, or throttle body injection (or central point fuel injection, I think Ford calls it).
Plenty of other things to check, but sudden no-start problems are usually because of fuel or ignition failure. If you haven't changed the gas filter or air filter in some time, that is a good place to start.

Feb 24, 2013 | Cars & Trucks

1 Answer

I Let my chevy Blazer run out of gas,nw it wont start even though the relay and fuelpump is working.


Is it electric or mechanical pump? Electric is with fuel injection. If its fuel injection, you should hear the pump run when you turn ignition switch. If u don't hear it, try starting, if no, turn off then on. It will self prime. Carburetor is with mechanical pump. I usually put few drops of gas in the carb. Start it, if no, more in carb till it stays running.

Jan 11, 2013 | 1999 Chevrolet Blazer

2 Answers

No fuel up to injecter pump truck just stalled


Did you check for fuel pressure on the line from the tank while you had the filter off? Do you hear your fuel pump prime when you turn the ignition on? First I would listen for the hum of the fuel pump when you turn the key to the run position (not starting the engine) May have to get a helper and listen at the gas filler neck with the cap off. If you dont hear your fuel pump, check your fuses and relays. If the relay clicks when your helper turns the key on ( put your finger on the relay and ear down close to feel/hear the relay actuate)., and fuse is good, yet you do not hear the pump prime, I would say your fuel pump is shot.

If it is a diesel,check for fuel pressure coming off the direct drive pump hose while cranking the motor.

Mike

Jun 14, 2011 | 1994 Dodge Ram 3500

2 Answers

Where is my fuel pump at? on a 1995 chevy camero 3.4 yes ran the car out of gas put so in wont start now what should i do first


Your fuel pump is in the tank. Turn on the ignition, and listen if you can hear the pump run in the tank. It will only run a few seconds if the engine is not running. You can repeat this several times to prime the fuel injection.

Feb 11, 2010 | 1995 Chevrolet Camaro

1 Answer

Silverado not starting unless prime


There is a check valve in the fuel pump that sounds like it may have gone bad. Check the fuel pressure at the shredder valve, there should be 60 to 65psi during the prime and will drop 5 psi when the engine is running. Once the fuel line is primed, check to see how fast you lose your prime. Since you replaced your injection system, we can eliminate the fuel pressure regulator leaking which was common on the injection system your truck run's on. If the fuel pressure drops fast then it's going to be a bad check valve at the fuel pump and it may be time to replace the fuel pump it self. Good luck and hope this helps. Note: do not try to start the engine with putting gas through the throttle body, it's been know for small fires to start and burn the spider injectors. 

Sep 04, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

96 Jeep cherokee ran out of gas, re-fuel, won't start. No spark.


You may have to prime the fuel pump. Or replace the fuel pump if that does not work. Why do you let it run out of gas? This is definately not good for an injected motor. It will continue to cause more and more problems. Fuel injectors should never run dry.

Jul 08, 2009 | 1996 Jeep Cherokee Sport

1 Answer

I have a cadallic escadale. It will turn over but wont start.


The fuel pressure should be 60 to 65psi in your system with the engine not running and fuel line primed, (ignition key's to the run position). Once engine is running the fuel pressure should drop by 5psi, change the fuel filter and recheck the fuel pressure at the shredder valve. it's known for the fuel pump to fail when the gas tank runs low or out of gas, the pump will end up burning it self out since the gas is what keeps the electric fuel pump cooled. The other thing to is putting gas through the top of the throttle body to start the engine on the SEFI is a NO NO, well a BIG NO NO. it's been know for the gas in the intake to catch fire and burn up the poppet valve in the injection system causing the replacement of the fuel injection system. Keep me posted and good luck, be gald to help you get your truck running again for the july 4th. OH and it was not mentioned but did the fuel filter get replaced???

Jul 01, 2009 | 2000 Cadillac Escalade

3 Answers

1997 GMC K1500 4x4 5.7 ex.cab SFI injection system


fuel pump died replaced it truck ran poorly afterwards. Had a prussuer test done pump determend pump was no good. Put in another ran good for 2 days started running poorly hard to start no power. 2nd fuel pump. So i figure another bad new fuel pump wow changed it put in a third brand new fuel pump. Still will not eve start now. I had it tuned up 2 months ago new plugs rotor, cap, etc. put in a new fuel filter made sure it is on proper checked all connections for leaks. this cannot be a fuel pump problem now. no problem with the elctrical i figure i have great spark on ignition tester. I can hear the fuel pump prime when i turn the key. but when i went and checked the fuel port i had no pressure. When it is being cranked gas sews out of the test port. Also i dont if this is comon cause i used to turn my keyand go. but when i have someone turn the key and i listen at the gas tank whn the key is shut off i hear gs spraying back into the gas tank. So i am open for opinions.

May 18, 2008 | 1993 GMC Sierra K1500

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