Join Date: Sep 2015
Location: Lexington, KY
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This was on a totally unrelated vehicle, but a similar experience.
It was an 89 Jeep Commanche Pick Up with the same symptoms.
I changed distributor, cap, rotor button, plugs, wires, coil, and none of that made a difference. Researched and worked on it for days. Finally, I wound up narrowing it down to a crankshaft position sensor. Replaced that simple little part and straightened things out. I'm guessing the old sensor sort of worked, but when it got warm it lost its ability to send a proper signal.
It never did throw a cel, but it was pre obd-2 too. The fuel pressure regulator went out once as well and caused it to dump massive amounts of fuel into it while running. It was running so rich that black smoke just rolled out of the tailpipe, like a diesel rolling coal, that didn't set off a cel either.
Last edited by Bojib; 04-22-2017 at 12:39 PM.