1986 Ford Bronco cranks but won't start

1986 FORD BRONCO
165,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MARKDILLARD
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  • 2 POSTS
I was driving down the road. Truck was running fine, and just died. Now it turns over but won't start. I've checked the fuel pump shut off switch, but it has not been tripped. I have never known of a fuel pump to just go out without any warning while your in in the middle of driving. Please help. It's sitting in the mall parking lot....
Sep 18, 2008 at 5:01 AM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Do you hear the fuel pump come On when key at run position? If so check the fuel pressure to rule out the fuel pump.

Or do below to determine if its fuel or spark

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil,distributor pick-up coil, ignition control module, cam and crank sensors-

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time/broken or jumped timing belt/chain
Sep 18, 2008 at 5:13 AM
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