Mechanics

MITSUBISHI LANCER RPM PROBLEM

2003 Mitsubishi Lancer • 150,000 miles

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
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Guest
January 30, 2013.



Have you checked for vacuum leaks? Also, you mentioned the IAC. Have you checked or replaced it?