Idle problem!! Please Help!!
Hi everyone, Im new to the Subaru family, I purchased a 03 WRX wagon about 4 months ago and I love everything about it! The engine is stock, except for a Forge BOV and a catback exhaust. But there is one problem that I have been having since I bought it, my wrx has a rough idle when starting and when I stop at traffic lights. I had it checked out by the guys at a Subaru dealer and they said it might be the MAF sensor, so they unplugged it and it ran fine without it. Now I bought a new MAF sensor and the idle improved a bit but it still has an inconsistent idle, fluctuating between 1000 and 500 RPMs.
Does anyone know what may be causing the rough idle?
And why does it idle better without the MAF sensor?
Im not sure if it has been tuned, how do I check that?
I would appreciate any help!!