scarampow

Hi guys, some times I drive s3 8p it feels like the turbo is not at its full potential, on the same day of feeling that, I switch it off and drive again, then it feels like a beast, my car is a 2007 model and only has 35k km on the clock, could your'll please help

kwekuq

Faulty DV maybe? Do you hear it go off as if the boost is being leaked out at high rpm?

scarampow

I changed the DV, I put the uprated one and I also changed the breather unit on the engine, could it be the oxygen sensor?

kwekuq

Can you give some more info of what exactly happens. So you floor the throttle then it gets to a certain rpm then sort of dies out?

scarampow

It drives perfectly, no cutting out, just at some times it feels very under powered, switch it off and start again, then it's like it was reborn.

amiram

John535is

Sounds like a sticky MAF or a loose vacuum hose.
Just a guess without any codes.
For the MAF you can get some MAF spray cleaner, if you decide to unplug it and take it off to clean it, when you reinstall turn the ignition on but not start. The maf should go through a re-commissioning set up, full open, full close a couple of times. After it stops then it should be good to start the engine.
A loose vacuum would produce a similar feel to a faulty DV, which you were on that path since you changed the DV. Just a thought.

scarampow

Thanks alot, I'm gonna try that

htikan

Hey man, just wondering if you ever got to the bottom of this as I'm having a similar issue