Ok i have a 1g talon tsi, its idling at 3k rpms. cant figure it out, need Help.

 

idle that higher usually means intake manifold gasket is broken. the effect is like holding throttle plate open

 

Probly what it is but whats wierd is when i disconnect maf it idles normal, would that still happen if intake manifold gasket is leaking?

 

Ok I took off the manifold gasket, its not broken its also the metal gasket. I was wondering can i reuse the gasket and slap some rtv on it? Or should i get a new one.

 

As long as the gasket is not bent or messed up im sure you can reuse it......

As far as the high idle i would replace the ISC, same thing happened to my car, if anything hit up the local junk yard and grab one, new ones cost a good chunk of change....

 

Well, changed intake manifold gasket today, still high idle.. Go figure, but now i'm hearing a hissing noise coming from top on intake manifold right by the injectors i think it might be one of the o-rings that go on the bottom of injectors. hopefully its not the intake manifold gasket.

 

Need to pressure test, but no compressor.

 

just spray starting fluid or something flammable around the general area and it'll rev up alot higher for a quick second when you hit the leak.

 

First step would be to do a boost leak test and find your leak before randomly replacing seals and gaskets. Instructions on how to make a boost leak tester are in the thread below.

IC Pipe Tester

Let us know what you find out.

 

found the problem the fiav was stuck open causing vac leak....got to love computer controlled vac leaks. idles at 1100 rpms now thank god.