Question about 1988 Ford Bronco II

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1988 ford bronco 2 wont start but engine rotates

Bronco sat up for a few weeks and then it wouldn't start. It will run as long as I have the key turned to the start position and pump the gas, What is wrong?
Thanks DAVID

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  • snakebstr Jan 02, 2009

    Ok, I went out and tried to start the Bronco with a new charged battery and the engine rotated but still didn't start at all.

  • Anonymous Jan 12, 2009

    The Bronco 2 has spark but still no start, engine rotates but does NOT start.

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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

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I just picked up a nice B2 that had a similar problem. I have no idea if this will work for you, but here goes... Off the negative battery cable is another small wire. This wire goes directly from the battery to the ECM. Make sure this wire is not broken, and if not, make sure it is securely connected to the negative terminal and not corroded. This is a major oversight when trouble-shooting this problem, and such a simple fix if it is the root cause. Like I said, the bronco I just bought had not run in 4 months, and the guy I bought it from had replaced both fuel pumps, TPS, fuel pump, as well as a few electrical components. When I showed up and saw this wire frayed and shorted, I fixed it, and drove off an hour later with the truck. Good luck!!

Posted on Jan 20, 2009

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David,
I just had the same problem. I went through changing the fuel pump, and it did not fix it.
This is what worked for me...

under the hood, on the passenger side of the engine compartment, there should be a black plastic cover. Under this you will find three relays. I believe it was the one with the brown plug. This should be your fuel pump relay. That was my problem.

p.s. a fuel filter may not be a bad idea.

BAM

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