IVe been to a number of mechanics as well as the mitsubishi dealership and none have been able to figure it out. I;m hoping someone else may have had this issue or a similar one and have a solution.

My battery had died, I bought a new one, put it in, now it starts right up but when i let off the gas it stalls right out. Runs great but the moment i let off the gas wether in park or on the highway it stalls.

Techs kept telling me it was my mass air flow sensor. So I replaced that and its still doing it. Another told me the computer lost its idle memory when i pulled the battery and need to drive it for a while to reteach it. its been days now and still no go. there are no error codes no check engine lights nada.

Im lost and none of these high paid techs here in new york seem to have a clue. please help if you can.

 

the idle speed control motor needs to be adjusted, if the throttle body is gummed up as well, have it cleaned out, then get the idle adjusted. if the idle wont adjust then the idle speed control motor will need to be replaced. pretty common problem on any mitsubishi after a battery replacement, or battery drain. if a mitsubishi dealer couldnt figure that one out, they dont have very good techs. find another dealer.