Mitsum

Is it the one at the rear of the engine or the one at the radiator itself?

Pete@ECSTuning

Near the intake.

Mitsum

already replaced that one in the last year (leaking)

Pete@ECSTuning

Any luck with cleaning the MAF then?

Mitsum

I don't know if this could help you dspur15, but I just found my problem, just have to order the part. The problem is the Crankcase vent valve leaking into the crankcase. Real easy to find when you know what it can do... Go at the intake manifold, just rear of your throtle body, you got 2 vaccum line. Disconect your foward lower one and stick your finger on it. Then start your engine (that part require 2 person...). If your idle now run's fine, your problem is the crankcase vent valve which is the part at the other end of the line you just disconected. I don't know if that fix apply to you, but it seems like a pretty common problem with this engine.
Good luck
Any question, I'll stick around for some days.

jtagle59

Whats the forward lower vacuum? Is it the one connected to the crankcase breather valve? like with the T connecter? I feel like mine is bad and I want to know which hose to test exactly. could you post a pic?

Chachboi

This may sound dumb but check your turbo inlet tube. The point where it connects to the turbo became soft and would leak really badly when warm until it got so bad it wouldn't start. Try unplugging the MAF and running the car without it. If that evens out your idle then it may be your problem.