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Got fuel pump to work truck will not start is there a way to prime fuel injected

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Every time you turn the key to the on position without starting the engine you will hear the fuel pump priming for 5 seconds. If not heard running the oil pressure switch has a third wire which runs to the fuel pump to complete the circuit. If that switch is bad it will turn on the pump.

Posted on May 02, 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

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

1 Answer

How do u prime a fuel pump


If you're referring to a fuel injected gasoline vehicle, self prime takes place at key start. If you still feel the need to have the computer repeat this process (or re- self prime), turn the key all the way until the dash lights come on, then turn off. Repeat this 5 times then attempt to start. If all the windows are closed and the radio is off, when you turn key on with engine off, you'll hear the fuel pump at the rear of vehicle buzz or hum as it's priming the system.

Sep 20, 2011 | 1998 Ford Windstar

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

1 Answer

My 1965 turbocharged John Deere 3020 started last week but I couldn't get it to throttle up past idle. I shut if off to investigate and now it won't start. Throttle linkage is fine. Fuel lift pump seems...


Try looking to see if the fuel-shutoff is working, open only one fitting instead of two injectors. Check the glow-plugs or intake heater if applicable. You can put an in-line electric fuel-pump in place. This can help you find out if there is a hidden fuel-leak, system loosing its prime, or bad lift-pump. If this still doesn't help then you may want to dig deeper and see if the shaft broke on the injection pump. Remember to mark the pump so you put it back exactly where it was. Rule of thumb is to set the timing to TDC on cylinder #1. Mark the gears with ink or white-out. and the injection pump case too. Let me know how its going.

May 21, 2010 | 1988 Ford F 150

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

2 Answers

After changing the fuel filter on a 3.5 petrol injection rodeo do you need to prime the fuel system


no; the pressure supplied by the fuel pump should easily purge any air.it won't hurt to hold the accelerator at a position of high idle on initial start-up.

Sep 27, 2009 | 2003 Isuzu Rodeo

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

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