Mechanics

'87 , FUEL PUMP/INJECTORS ??!

1987 Lincoln Town Car

I just got the car, its been sitting for 3/4 yrs. I was told that the fuel pump was out, but before replacing it I determined there was just no power to it. Just to be sure, I jumped the fuel pump and it operated correctly, there is no filter blockage, there is adequate pressure to the fuel rail, and the car is firing correctly. If I apply fuel through the air intake it will temp. Start and run fine. I checked the injectors for power with a meter and they are hot with the key on. What would cause the fuel pump not to run when the key was turned on, and why will the injectors not take the fuel even when I jump the fuel pump! Thanks for any help you can give me!
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Garage911
December 17, 2006.




Don't know these cars, but as for the fuel pump not working with key on I would suggest checking the pump relay and or inertia switch.

Adequate fuel pressure? Is it within specs?

Good luck. Let us know what happens.

Tiny
Hyknrd
Dec 17, 2006.
I would check the fuel pressure regulator
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Tiny
Tmssfh
Dec 25, 2006.
I read that it needs 39psi of fuel pressure to run and I has just under 42. I can jump the fuel pump relay and make the pump run, but it doesnt run with the key. I made sure the inertia swith worked properly and even jumped it. I switched out the module on the distrubutor for the injector pulse. Still nothing. The injectors are getting power with the key on. I appreciate the input guys. This ones' got me stuck!

Tiny
Garage911
Dec 27, 2006.
Hi garage911----Here is some info that might help you out : arrow: Test for Injector Pulse. Remove injector connector to insert injector test light (node) or volt meter. Observe light flash or gauge pulse while cranking. If light/voltmeter doesn't responded a Ignition Distributor/Crank Angle Sensor (CAS) or a Ignition Module is most likely your problem.

Question: 2001 Dodge 1500 mileage: 67,000. Where do I find info on test procedures for fuel injection? Test code shows a bad speed sensor, but the sensor itself tests good. The car is not getting any fuel but has correct fuel pressure to injectors. Can you tell us anything - if not, do you have suggestions where to look?

Answer: First check all electrical fuses, scan the PCM for trouble codes, then check fuel pump and fuel pump relay.

Question: 2002 Ford F-150 mileage: 61,000. I don't know much about cars, but from what I could tell I was not getting any fuel, because the car will start, for a few seconds when I pour gasoline, into what looks to me to be the injectors. Anyway, I replaced the fuel pump, which definitely was faulty. I am now getting fuel almost up to what looks like a injector. A gas line goes to each side of it, and the line in the front gets filled with fuel. (When I unscrew it, fuel squirts out with much pressure). My problem is the fuel doesn't go anywhere. Is it possible that I mixed up the lines when installing the new fuel pump? At present, I have the line that is pumping the gas attached so it will go through the fuel filter. Or could some small outlet (that is too small for me to see) be clogged, causing the fuel to be trapped in the line? All together, the car has 3 fuel lines coming from the gas tank. One goes to the front of the tank looking device, one goes to the the fuel canister. I apologize for my lack of knowledge and I hope I have explained the situation well enough for you to understand and help me.

Answer: It sounds like you have a fuel injector that have electrical windings that short circuited. This shorts out the injector driver in the computer causing the car to no start until the fuel injector is replaced.

What's the deal with the relay? Are you bypassing it?

Tiny
Hyknrd
Dec 27, 2006.

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