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catalyst efficiency

  1. General Discussion
    My daughters car (2006 Saturn Ion Level 2 - 108,000 miles) starting running rough for a while but then would run fine. I pulled the codes and got a P0326 so I replaced the knock sensor. Next day same problem, pulled the codes again and got a misfire code. Replaced the coil pack and it runs fine...
  2. Problems & Troubleshooting
    Hello there guys, I have visited these forums a few times since ownin my Redline but havnt had to post yet, But sadly today is the day I must discuss a odd series of problems. to start, I was driving in town running errands to get ready for a fishing trip in the mountains, a check engine light...
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