OK I just had Autozone check the engine code and it was P0300 multiple Cylinder misfire which it has been the last two times I've had it in for repairs over the last week. Keeping in mind that I just had new plugs, wires, cap, rotor and tune up one week ago ( which eliminated the service engine light for 1 day - but never affected the change in exhaust sound), then 2 days ago the Mitsu dealer checked it, reflashed the computer, light went off for 24 hours but came back on and the exahuast still does not sound right. The dramatic change in exhaust sound happend right before the light came on for the first time, and all the work to date has not changed the exhuast sound back to what it originally sounded like. This seems like this is a key clue in the problem and I'm wondering if I have a catlytic converter problem which is causing fouling or misfiring. I'm at the point of telling the mechanics to stop doing tuneups and parts replacements and look at the exhaust system - does that sound like the right direction to try?
have the same problem?
Saturday, April 12th, 2008 AT 9:56 PM