Question about 1997 Buick LeSabre

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97 Lesabre misfire

Im working on a 97 Lesabre with the 3800. The first time i scanned it it was missing on 3 and not on any others....swapped wires with 6 and 3 ... still missed on 3. Put new plug in 3 the next day and rescanned car and now shows miss on 6 only. The wire was what looked to me to be arcd damaged ( it was black and sooty) where the plug goes to coil pack. So now focused on 6. Swapped 6 and 2 and now misses on both 6 and 2. When I swap the wires back it goes back to missing on 6 only. Any ideas why it sent me to 3 first? I plan to try a new wire on 6 and inspect the plug next.

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  • joey  shearer
    joey shearer Jul 19, 2009

    Update to issue. The problem was the loose wire connection on coil causing the visible arc damage which made the wire and also made the coil pack fail. This is why when switching only the wires and then only the packs didnt make problem follow. New 3 6 coil pack and new #6 wire car runs great.

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  • 148 Answers

Change all plugs an wires if you still get the misfire on #3or#6 the coil pack is parabley bad

Posted on Jul 17, 2009

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