Question about 1991 Ford Bronco

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1991 ford bronco fuel pump wont shut off

Have to turn key off to stop fuel pump from running

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The fuel pump should turn on for about 3-5 seconds when you turn the ignition switch to on. If the engine starts the pump should still continue to run, if you do not start the vehicle the pump will shut off. It sounds like your fuel pump relay is stuck. Sometimes they will stick on even with the key off. The relay should be located in the relay box, under the hood on the drivers side on the inner fender well. You can try tapping on the relays with a end of a screwdriver, etc. See if that does anything for you. If that doesn;t help I will have to look up some info. Been a while since I had issues with that .

Posted on Mar 31, 2014

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6ya6ya
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Posted on Jan 02, 2017

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angelo63
  • 129 Answers

SOURCE: 1988 ford bronco 2 wont start but engine rotates

souds like you have no power to the coil when key is on

when you crank the motor you get a boost of 12v from the starter circut thats why it only runs when you hold the ket on start and stops when you ley it go

turn your ignition on and check with a test light if you have power if not check all fuses

you can jump a wire from the + side of the battery to the + side of the coil to keep it running to get you to a garage if you cant find the problem
good luck

Posted on Jan 02, 2009

Suraido
  • 195 Answers

SOURCE: 1987 ford bronco fuel issues

First thing to check out will be the fuel pump relay under the hood. It is the one who drives the pump, so if it is defective the pump will not work either to prime the engine, or to make it run. Secondly, you need to check if the fuel filters are OK cause sometimes they clog up and prevent enough fuel from reaching the engine. Thirdly, check the injector(s) for cloging, and clean or replace them as needed. If none of this helps, then the problem probably has nothing to do with fuel delivery, and the next step to check will be the whole ignition system, which is also one of the most comon bronco problems.

Posted on Jul 07, 2009

  • 242 Answers

SOURCE: 1987 FORD FULL SIZE BRONCO FUEL PROBLEM, SHUTS DOWN

The only way air can get in the fuel line is if you have a hole in it! Problem of course is were? I would run the fuel line from back to front and back again. Look for any wet spot that you can find. You may even have to drop the tank to ba able to look on top. I would suspect the problem is in the line before the high preasure pump, being as you are pulling air into the system. I have seen leaky lines allow air in, but not let fuel out.

Posted on Sep 12, 2009

  • 1 Answer

SOURCE: Fuse panel diagram for 1990 ford bronco 2

Here's the diagram for the fuse panel under the dash. There is also a fuse panel under the hood next to the air filter.e589aae.jpg

Posted on Jan 29, 2010

Rickygittins
  • 715 Answers

SOURCE: no power to fuel pump

check the tan- lt green wire on the fuel relay that is located on the right fender, mine wasn't pushed in all the way, this wire shut down injectors and fuel pump, if you are looking for the shut off switch to reset the relay, it is on the passagers side floor board under the dash, gas two wires, orange and pink, I don't remember the color of the stripes, I removed this switch and wired them together without a problem

Posted on Apr 27, 2010

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