1998 Pontiac Sunfire
2.4L 4cylinder DOHC
Chain driven timing, chain driven water pump.
Codes revealed engine misfire, idle control problem
Data stream showed negative fuel trim on short and long term, low MAP reading, but low 02 with very slow to respond on post cat o2 sensor
Mentioned the gasket only because I noticed it, but head was dirty, so was the cover. I thought it may have been changed because of an oil leak. Also, it was near the apparent fire damage. But no evidence suggesting it was recently worked on. Most OEM GM gaskets are black, this one was blue.
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