Question about 2001 Pontiac Montana

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Check engine light is on and flashing and it's not running properly

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You most likely have a misfire, get it scanned, if it's not a random misfire the scanner should tell you what cylinder it is..., have you done plugs and wires recnently? if not, it might be time, if so, check the wire connections, if that doesnt work you might have a bad plug, which happened to me, part of the ceramic insulator broke off, and caused my misfire and flashing CEL, a good check is to see if the spark plug wire twists freely.

Posted on Jul 27, 2009

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