1990 Mustang GT Fuel Pump not Priming - Ford Mustang Forums
 
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post #1 of 12 (permalink) Old 10-13-2009 Thread Starter
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1990 Mustang GT Fuel Pump not Priming

My fuel pump isn't priming but is running and the car won't start.
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post #2 of 12 (permalink) Old 10-14-2009
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Need more info.,
Is this a new pump ? or the stock pump ?
Have you recently had the fuel cell down for any reason ?

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post #3 of 12 (permalink) Old 10-14-2009
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User 89coupe is very knowlegable with the electronics to test the pump or the relay. He helped me when my pump when out. There is a wiring harness under the hood of your car right behind the driver side strut, you can jump the harness, (theres 2 located there) and you will here either the relay and the pump come on or just the relay so you know the pump is out or nothing wich will send you on to the next ordeal. I will see if I have the thread saved. I could here my relay come on but the pump was dead. Its easy to swap out though. I did it by myself with basic hand tools.

"Nitrous Oxide is like a hot chick with an STD. You want to hit it but you are affraid of the consequences."

91 GT convert. GT40P's, Off Road H-PIPE, Flowmasters, 4.10s, posi rear, welded subframes, 70mm TB, TFS Stage 1 cam, 155lph holley pump, Cobra intake mani, ford racing headers, Allum. Radiator, No smog, Freashly rebuilt......

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post #4 of 12 (permalink) Old 10-14-2009
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Check this out, should help. But like 1fast93stang said, more info would help!

http://www.allfordmustangs.com/forum...el-relays.html

"Nitrous Oxide is like a hot chick with an STD. You want to hit it but you are affraid of the consequences."

91 GT convert. GT40P's, Off Road H-PIPE, Flowmasters, 4.10s, posi rear, welded subframes, 70mm TB, TFS Stage 1 cam, 155lph holley pump, Cobra intake mani, ford racing headers, Allum. Radiator, No smog, Freashly rebuilt......

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post #5 of 12 (permalink) Old 10-14-2009 Thread Starter
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its the stock fuel pump and all i did before this started happening was change the solenoid
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post #6 of 12 (permalink) Old 10-14-2009
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Quote:
Originally Posted by bigmike73 View Post
My fuel pump isn't priming but is running and the car won't start.
How is it not priming but running? Do you have it hot wired to run?

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post #7 of 12 (permalink) Old 10-14-2009
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try hitting the fuel reset button in the trunk?? my car wouldn't start and you couldn't hear the fuel pump. i hit that switch and it fired right up
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post #8 of 12 (permalink) Old 10-14-2009
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I understand now. Your saying the pump works, but isnt running.

Check the Orange/light blue wire at the back of the fuel pump relay. Should have 12v or so, key on or key off it doenst matter.

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post #9 of 12 (permalink) Old 10-14-2009 Thread Starter
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no i can hear the pump run but i can't hear the loud whining sound that i use to hear when i first turn on the key
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Do you have spark?

whats the fuel pressure?

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post #11 of 12 (permalink) Old 10-14-2009 Thread Starter
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how do you check the fuel pressure
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Go to the auto parts store and rent a gauge. They will refund your money when you return it.

Do you have Spark at the Plugs?

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