RE: 97 caravan backfires sometimes
Th thing that usually goes bad is the vacuum solenoid which comes with the valve. It will eventually set a check engine light. I've gone through this with a few of my caravans and was usually pre-ceded by poor gas mileage before the mil light. On my first 97, I remember a few backfires (one of which actually split the crimp on the muffler) , and this was before the mil came on.
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Caravan Fan....have owned 7 and praise their virtues, but woe their transnission flaws. I use a broken differential pin as a key chain if that's any sign. 2 1988 w/2.5l, 91 GC w/3.3, 94 GC AWD w/3.3, 2 1997's w/3.3 and 99 w/3.8
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