Tdhodp

Hi guys. Having idle issues with my evo 7. Car was running a bit rich which was put down to a bad upstream O2 sensor which has been replaced. Ran fine for a month or so and in this time I have changed the standard intake for an apexi power flow system. Had no issues with this whatsoever until last week the car developed a dodgy idle. Runs ok first thing but once up to temp and idling it will bob up and and down and sometimes stall. I cleaned the MAF sensor as thought it maybe oil residue from new filter, to no avail. I then cleaned the IAC valve which was quite sooted which I assume was from the motor running rich. This seemed to sort it for a week of two and now is idling badly again. I'm a complete novice when it comes to cars and all the trouble shooting I have done so far has been from posts on here. Hope you guys can help and please bare in mind I'm a total beginner when it comes to mechanical stuff! Cheers

Biggiesacks

Check for vacuum/boost leaks, check spark plugs, and go from there.

Tdhodp

Ok, sweet. Will do. Thank you