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Old 02-02-2016, 01:43 AM
138jbeck 138jbeck is offline
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Re: Urgent Help Needed for a "Mystery Miss" on a 1990 Caravan 3.3

Quote:
Originally Posted by MikeCStig View Post
I would start with a thorough check of all the wiring. There could be more issues similar to the one that was causing the transmission issue. Stripped wires, bad grounds, loose connections and things like that can cause a lot of problems. Check all of the fuses too. If there's one particular fuse that burns out repeatedly, that might give you a clue as to where you should look for bad wiring.
Thanks for the tip, will go over the wiring and check the fuses. I did check the injector wiring harness as it is routed over the exhaust crossover pipe and evidently has caused burned and shorted wires in other 3.3 Caravans. What I still can't wrap my head around is the fact it seems like it only starts cutting out when the engine has completely warmed up, after a few miles of driving. I know that when cold the engine is in an open loop mode, so maybe the O2 sensor is causing the bad miss.
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