2003 Mitsubishi Lancer Only Heated Months Traffic Ilde 600 Rpms 1500 Gets

2003 MITSUBISHI LANCER
150,000 MILES
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Only in heated months and in traffic my ilde goes from 600 rpms to 1500+ rpms and gets higher depending on how much traffic but then i get to highway speeds it goes back to normal. Out of ideas...IAC sensor,sticking throttle cable i give up
Jan 30, 2013 at 12:32 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Have you checked for vacuum leaks? Also, you mentioned the IAC... have you checked or replaced it?
Jan 30, 2013 at 7:18 PM
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