I have a 2006 Mitsubishi Rs Lancer and I recently changed the spark plugs and air filter and after a day my idle starts to jump when I am parked.....Can anyone give me a clue or hint or answer to this problem? I've rechecked everything....I did get an oil change on Monday but can't think of anything that might have caused the jump. Thanks

 

Reset the ECU by disconnecting the battery for 20 minutes.

 

OK i'll do that...what about if the gap size was wrong? I bought the spark plugs from the dealer and they came pregapped. what is the right gap size for this car?