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Mazda Tribute Coil and Spark Problems
Please help. I have the 05 Tribute V6 with 59000 mi. on it. It has been running fine and smooth until last week. It refused to start. We towed it to the dealer. After a day, the dealer informed us the PCM was bad and they would replace it under warranty. We were so happy but not for long. The next day, they called us and said all 6 spark-plugs-coils misfired. And that's what killed the PCM. We have to replace them all before they give us the new PCM. The cost is $987 plus tax.
Do you guys think the dealer is correct in their diagnostic? Can spark-plug-coil-misfire kill the PCM? We have the car for 3 and half years. I have never experienced any misfire. The car has alway run very smooth averaging 21mi./gal in mix driving (70% highway, 30% city). Although, I've always thought this Tribute was harder to start than average. I have to turn and hold the key for 2 or 3 seconds to start it. My other cars take 1 second.
Thank you in advance for your opinions.