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Old Dec 24, 2006 | 05:56 PM
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Question 85 Bronco Help

i have a 85 bronco with the 351 H.O. all i have done to is but a edelbrock carb on it....my question is the only way it stays running with i keep the engine turning over as soon as i let go of the key it shuts off...i cant figure what the problem is...
 
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Old Dec 24, 2006 | 07:41 PM
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The most likely cause is a faulty ignition switch.

It also could be a broken or burned resistor wire, that runs from the switch to the coil. Probably a bad switch, though.
 
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Old Dec 24, 2006 | 07:48 PM
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ignition module will also cause that check the white wire comming off the module see if it has voltage when u spin the engine it is the plug with 2 wires, better yet check them both for voltage
 
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Old Dec 25, 2006 | 09:52 AM
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I'm not sure on that year, but it could be the power to the fuel pump is only working when you turn the key. I've seen it before. I believe it has some kind of sensor to tell if the engine is running. If it thinks its not, it cuts the power to the pump. (so it doesnt pump fuel out in an accedent.
 
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Old Dec 25, 2006 | 10:01 AM
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85 351 Ho Has A Mechanical Fuel Pump
 
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Old Dec 25, 2006 | 11:39 AM
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so does the engine fire or is the starter the only thing keeping it moving?
 
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Old Dec 25, 2006 | 12:22 PM
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the engine will fire and but only when the starter is turning over
 
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Old Dec 26, 2006 | 10:48 AM
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Ok, I have the same bronco but I am away on vacation. I will pull out my books and help walk you thru this as soon as i get back.
 
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Old Dec 26, 2006 | 01:37 PM
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ight sounds good
 
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Old Dec 26, 2006 | 10:35 PM
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well the bronco is running......heres a question fora how u fix a leaky gas tank with out replacing it?
 
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Old Dec 26, 2006 | 11:44 PM
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So what got it running?

I've pinholed the tank from rocks trapped inside the skid plate/tank mount. JBweld patch holds gas just fine.
 
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Old Dec 27, 2006 | 01:11 PM
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the ingntion moduel and coil must have been bad as soon as i replaced both of them it started right up...now i got a leaky tank is there anything i can pour something in the tank to make it stop leaking
 
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