My car idles high after driving for 15 miles or more between 2000-2500 rpm, When I put the car in park or neutral. When I shut off car and restart idle gos back to normal.

Asked by Oct 19, 2014 at 04:04 AM about the 1999 Saturn S-Series 4 Dr SW2 Wagon

Question type: Maintenance & Repair

It's a 4 cylinder automatic.  1999 Saturn
SW2

5 Answers

19,630

Could be a bad throttle position sensor, bad/dirty mass air flow sensor, the intake might need to be cleaned. Are there any check/service engine soon light on in the dash?

Nope, no service lights... nothing else wrong with the car, drives well accept for the high idle after long drives.

19,630

Ok if there are no service lights on then it's probably going to be one or more of the things I mentioned earlier.

Ok thanks, will look into that....

19,630

Ok, n good luck.

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