Lotuis

Hi i sorry for my bad english but i need help with my audi s4.

I have a audi s4 2.7 biturbo 1998 mod and i have some performance problem.
My problem is when i'm out driving all is good when you drive normal but right away when you hit the pedal to the floor and have had a few hard acceleration's the car losing some power and the noise from the exhaust get's louder.
And it sounds alittle like i'm losing 1 sylinder.
but if you continue my drive after maby 15min off normal driving the problem goes away but the min you do a hard acceleration again the problem come back right away.

I get no fault codes
it is chiped and have a upgraded exhaust all the way

I really hope someone can halp me with my problem

Kris Hansen

does it misfire while doing that? Have you checked for boost leaks?

Lotuis

there are no misfire at all, and i have not found any boost leaks.

Brian Holwerda

Camshaft position sensor?

Lotuis

i don't get any fault code for cam sensor and i guess if i get any fault with thouse sensors my car will run pretty bad or not at all.
so i don't think it is anything wrong with my cam sensor