RPM stuck at 4000

2012 SATURN
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AFCS
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Have had this problem since 2001. Have a 1992 saturn SC DOHC with about 187,000 miles. At idle, if I rev up the engine the RPM's will not go past 4000. I remember it started after driving through a bad snow storm in germany. I believe I may have burnt the catalytic converter during the storm. Anyone has any suggestions.
Jan 13, 2007 at 5:07 PM
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SERVICE WRITER
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I would check the throttle position sensor. It may be telling the pcm the throttle is only partially opened.
Jan 13, 2007 at 8:24 PM