After 50 miles engine light came back on, cars runs awful again. Many codes: o2 heater ( replaced new). Multiple misfire, IAC low, .then just quits, or Catalytic converter gets red hot. Any ideas? 2004 PT Cruiser
From my questions from yesterday.
I'd check the misfire issue first. How old are the spark plugs? I'd clean the MAF as a precaution.
Only a year old on plugs , wires, coil. Just replaced timing belt yesterday, but was doing same thing before. Was running flawlessly until this afternoon. As above statement just had up stream and down stream o2 replaced. Checking with my little scanner everything peachy until 50 ish miles after reset then it all starts over again. 130K on engine.
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