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'96 GMC Jimmy died while driving / will not start
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tripntx
Novice
Jan 20, 2008, 8:39 PM
Post #1 of 7
(2764 views)
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'96 GMC Jimmy died while driving / will not start
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1996 GMC Jimmy 4.3L, auto, 2 WD, 186k miles. Died while my wife was driving it, fuel pump had been sounding bad, so I replaced the fuel pump and fuel filter without trouble shooting, big mistake and waste of money. Not the problem. Excellent fuel pressure at intake. Next replaced crank position sensor, ignition coil, coil driver module, cap, rotor, and distributor (high voltage switch) with cam position sensor. Engine turns over, does not start. Have sprayed starter fluid in intake, no luck. Ohmed across all fuse in the dash, all are good. Verified 12 volt dc at ignition coil and coil driver module. Verified 12 volt dc through fusible link from battery. Disconnected battery leads and cleaned them. Connected tester from auto zone, no faults found. Please help me identify the problem. Disconnected a plug wire and connected it to a spark tester, didn't have spark.
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tripntx
Novice
Jan 21, 2008, 10:37 AM
Post #3 of 7
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Re: '96 GMC Jimmy died while driving / will not start
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Dan, I've also been thinking about taking it in, actually been thinking about that all night long. Either have a bad VCM, ignition switch, open wire, poor conducting ground, or something else? Hopefully a dealership will have the proper test equipment to diagnose the problem without having to resort to diagrams and meter.
Does anybody have anything in mind that I should check before having it towed to the dealer?
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DanD
Veteran
/ Moderator
Jan 21, 2008, 11:41 AM
Post #4 of 7
(2746 views)
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Re: '96 GMC Jimmy died while driving / will not start
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Have you checked whether the distributor is actually turning? I’ve seen a number of distributor drive gears become so worn that they will no longer be engaged with the camshaft gear?
Just a thought.
Dan.
Canadian "EH"
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tripntx
Novice
Jan 21, 2008, 11:53 AM
Post #5 of 7
(2743 views)
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Re: '96 GMC Jimmy died while driving / will not start
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It turns as the engine is cranked, I checked it yesterday evening.
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tripntx
Novice
Jan 21, 2008, 4:56 PM
Post #6 of 7
(2736 views)
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Re: '96 GMC Jimmy died while driving / will not start
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My chiltons manual doesn't show a ignition or engine relay. Rotor does turn while engine is turning over. No spark coming out of coil either. Wouldn't be the first time I had seen a new part not function properly, not something I want to consider. Just makes the blood boil thinking about such things. Rain has set in for the week and my wife doesn't like finding a way to and from work so the Jimmy is being towed to the dealership tomorrow morning. Thanks for all the advise.
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tripntx
Novice
Jan 22, 2008, 6:52 PM
Post #7 of 7
(2725 views)
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Re: '96 GMC Jimmy died while driving / will not start
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Jimmy was towed to dealer this morning. They called this evening, it was the VCM, PCM, ECU, whatever you want to call the black box on the passenger fender well is the part that is bad. The ignition should be good for a while longer with all the new parts.
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