Question about 1991 Ford Mustang

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I need help finding the lacation of the fuel pump relay on my stang?

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  • Chuck Martin
    Chuck Martin May 11, 2010

    what engine size do you have?



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What size engine do you have in there?? im a ford man forever..

Posted on May 16, 2009


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I checke the fuse and the Relay switch. and it was all fine

I believe the previous person whom answered your previous question on the NO Start asked you if you had pressed your Fuel Pump Inertia switch in to Reset it? I saw that you had indeed replaced the fuel pump relay but I didn't see that you had done this yet. I've attached a picture of the Fuel Pump Inertia switch location on your 1998 stang. Hope this helps you on your no start. I hatre it when you try and do something to improve your baby and she slaps you in the face with another issue. Try this get back to us. here. Ryan MN

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Look for your ecu relay its above your mustangs ecu. Look behind the passengers side scuff plate. Its kinda tough to reach on the 87-93 5.0 Mustangs it may be easier on your 4 banger try to access it by releasing the glove box retainers by squeezing side of box once opened it should pop loose for you. Now look to the right there should be a Classic 80's style ford relay take this relay off replace it also check your fuel pump relay as it may be causing these issues. On my 87 5.0 the fuel pump relay is under the drivers side seat, yours might be in the same spot if not look for the relay located by maf in the engine bay. The relay looks identical to the ecu relay replace this also might as well since you're troubleshooting a car over 20 years old...... I think you can get them for 5-10 bucks at any auto parts place. hope this helps you or another person with the same issue on their stang. Look at picture for what these relays should look like I circled it for you.

Feb 08, 2014 | Ford Mustang Cars & Trucks

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Where is the lacation of fuel pump relay on toyota highlander

toyota suv fuses relays location are passenger compartment left kick panel.passenger compartment on left end of dash under hood engine compartment on driver side.

Jan 11, 2013 | 2002 Toyota Highlander

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Can't find the reset button for the fuel pump

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Dec 18, 2011 | 1991 Ford Mustang

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Where is the fuel pump lacated on the car 2004 chevy cavalier

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1990 2.3 stang won't start after sitting a few months got spark, had to jump fuel pump relay to get fuel pump to work got 35-40 psi but when i turn the key the fuel pressure drops.I fixed ground to...

If I remember correctly, the signal for the pump comes from the cam sensor. The pump should run for 3-6 seconds when the key is first turned to the "on" position and then when the ECU registers pulse from the cam sensor it sends the signal to the relay to run the pump. If you have a signal coming out of the cam sensor I would look to ECU replacement.

Dec 18, 2017 | 1990 Ford Mustang

1 Answer

Fuel pump relay location

The relay is lacated under the hood possible location would first be in electrical juction boxes, yours could have up to three of them, it would be marked under the cover of the lid, the other place it could be is at the passenger firewall, usaully three or four of them together, If there is three the fuel relay is the center, if four it is the third from left

Jun 13, 2010 | 2000 Mitsubishi Eclipse

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Trying to locate relay for fuel pump

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Oct 02, 2009 | 1988 Toyota Camry

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1988 mustang 5.0 efi flooding engine will not start fuel pump constantly running, fuel reg. replaced will actually fill and with fuel and only fire if pedal is to the floor?

Step one
Click the key forward BUT don't start the car listen for fuel pump to pressurize and shut off. But if the pump keeps running change the fuel pump relay switch under drivers seat. If its pressurizing and shuts off then its not your fuel pump. Fuel pressure at rail when idling is 30 psi.
Let me know what happens cause I know alot about Stangs had 2 5.0

Apr 21, 2009 | 1988 Ford Mustang

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