2003 Mitsubishi Lancer Idle Problems

2003 MITSUBISHI LANCER
110,000 MILES • 4 CYL • FWD • AUTOMATIC
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ACE99X2002
  • MEMBER
  • 1 POST
well it started by the idle was real low (500- 600) almost cutting off. then at stop lights it would idle down to 400 where it was barely staying cranked so i adjusted the idle on to of throttle clockwise and it didnt change the idle i rotated 6 times completely. then i was told to clean my throttle plate for build up so i did looks brand new i used brake cleaner and tooth brush was told it wouldnt harm it. then turned idle down 6 rotations. just to make sure i didnt over adjust it. then the car wouldnt start and stumble for 10 seconds the quit so i adjusted idle up now idles at 700- 1000 which is kinda in specs (600-800) but at stop light my idle was normal then it would drop suddenly to 500 for about 10 seconds then right back up to 1000 and i noticed that before stopping i let go of the gas it idle up to 1500 then down to 800 after a few seconds before i hit the brakes so now im just confused
Apr 29, 2010 at 4:06 PM
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RASMATAZ
  • ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the idle air control motor and test the throttle position switch
Apr 29, 2010 at 4:33 PM
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