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  1. I

    1991 backfiring problems

    so you were right I thought the firing order was: Engine: 3 6 2 5 1 4 Coil Pack: 3 4 2 5 1 6 But the coil pack is actually: 3 4 2 6 1 5 I looked at a diagram and even wrote it down wrong. Thanks sometimes you just...
  2. I

    1991 backfiring problems

    Hello, Im new to forum post, but I end up here a lot when Googling problems with my 1991 Explorer. Anyway, I was getting below average fuel economy and decided it was time for a tune up, I purchased new plugs ( Bosch Iridium #9655 ) and wires. When installing the new ones I crossed numbers 4...
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