[CorradoKID]

OK, I have posted this before but I am running out of ideas.... My 2005 A4 1.8T is less powerful at full throttle and looses boost as quick as the rpms go up when its hot. I have fixed the dipstick so the crank case holds pressure now, rebuilt the entire forge 007 DV, had the throttlebody re alligned, the fuel filter isn't noisy at all, the k&n filter is clean, fuel is good, etc etc... I did just put a 2.5in Dp and exhaust on and it leaks a little after the dp but can barely tell. When the car is cold the first time you floor it it holds at 19lbs and pulls HARD.... Once it gets warm it fades a bit. It actually pulls better when my foot isn't to the floor. I was thinking heat soak but you can feel the power come in and out under full acc. The only other mod on it is the N75-J valve and 93 oct APR software. I have not found any vacume leaks, but when i'm hitting it hard you can feel the ac cut out a bit.... but like I said I can't find leaks.

I am running the blue spring in the DV now which made it smoother. (took out the red stiff spring)

I have just run out of ideas.... Any other suggestions?? Big E feel free to chime in ANY HELP would be great, I just want it to run how it is supposed to....thats it.

[lite1979]

It honestly sounds like you've got a boost leak at high boost. As temps go up, your rubber will soften, and whatever crack/leak is present will make itself more pronounced as you increase temp/boost. I would go through all your vacuum lines (especially those that connect close to the intake, like the fpr to intake and the one right next to it, both should be right under the front side of the intake on the bottom). You'll have better luck feeling with your bare fingers than you will trying to look at it, so just close your eyes and try to feel a crack in one of those rubber hoses. Don't limit yourself to just those hoses, either. The hard lines under the manifold can leak also, and you never know when one of your hose clamps isn't up to the test until something like this happens. It will help to have a friend listen to the motor for hissing noises. Two heads > one.

The warm weather doesn't help either. I normally can chirp 2nd gear in my car any day of the week, but when it's 85+ outside, not so much..

[sasquatch]

Stock ic?

On my passat its similar, after a few hard pulls when the car is cold/warm it feels slightly more sluggish after that. I thibk its because the crappy stock IC is heat soaked. Very noticeable on very warm days.

I thibk Big E said something about it when getting his maestro tuned, I thibk the guy said after a few pulls the INtake temps were off the charts.

Good luck!

[spam16v]

is the leak in the down pipe before the rear oxygen sensor? that's a bad thing. and yeah, like steve said, sounds like a bit of heat soak and it's pulling jam when it's hot to keep it from melting down.

[CorradoKID]

I appreciate the help guys, going to take a ood look at everything over the long weekend... I just want this thing running right. Anyone hear of anything good on those fmic on vortex that bolt to the stock piping for like $400.00?

[CorradoKID]

Well I ordered the APR turbo inlet hose, APR FMIC, Samco TB hose... I am bound to find the problem soon!!

[KurtCav337]

I'm assuming lite meant check the hoses that connect to the underside of the intake manifold. That's where I found a leak last weekend.