1999 Saturn SL2 RPM fluctuats between normal and sometimes goes to over 2000 while running ? what causes this ?

Asked by GuruFY3L Nov 17, 2017 at 10:41 AM about the 1999 Saturn S-Series 4 Dr SL2 Sedan

Question type: Maintenance & Repair

Sometimes the RPM will go up for no reason, when cold or hot, is dangerous when driving ! Anyone know what causes this ?

2 Answers
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Paul answered 7 years ago

Sounds like a TPS a throttle position sensor that could make your idle go up wildly up and down I would recommend probably replacing that other than that I would say a tune up and make sure everything else is good but when I had issues like that when I was at Park the RPMS jumped wildly so it's probably your TPS sensor?

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Tyler answered 6 years ago

I'm also having this problem besides it trying to stall and run really rich please help. It was showing code for knock sensor so I replaced it and still does it

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