Hi. I have a 04 evo 8 and lately when I'm stopped the cars RPMs will jump from 1200-1500 and then back down again. It seems to only happen once the cars warmed up and it does it almost every time I'm stopped. Any help would be appreciated. Thanks

 

Sounds similar to an IAC related issue.
Possibly a bad leak somewhere as well.

 

IAC? Ill look into it and if you mean a boost leak I just had a tuner not too long ago do a test and he didn't find anything. Tuner was WORKS btw

 

Idle Air Control Valve, historically mitsubishi has had a difficult problem with them. DSM's always have issues with idle surging. Sometimes they need to be replaced, sometimes just cleaned.

Are you throwing a CEL?

 

https://www.evolutionm.net/forums/ev...e-problem.html

https://www.evolutionm.net/forums/ev...ge-my-isc.html

 

Ahh okay and nope no CEL. I am using the stock dv would that have anything to do with it?

 

What do you mean by DV?