Drunk fool

Whats up all,

A few weeks ago when I purchased my car they filled it with horrible gas that practically made the car undrivable. It would stutter and shake under acceleration. I figured it was bad gas and so topped it off with 100 octane race gas and it more or less cured the problem. Now though, that I am running 91 octane, the car stumbles or stutters under very light acceleration when I pass the 3000 rpm mark. At WOT it runs fine in all gears. I have tried searching but it seems that everyone with the same problem is running a chip. I am almost positive the car is stock as it is no faster than the other S4s I drove. Thanks for the help!

Philippe
2001 w/45k

Milpitas2.7T

Check to see if you have a chip both GIAC and MTM stutter around 3K

Drunk fool

but the car drives the same as the other used S4s I test drove, all were stock

Milpitas2.7T

Hmmm.. VAG it see if there are any DTC's, on 91 craptain my car runs fine

andrec

I have an '01 S4 w/ a little of 10K miles on it. Just experienced the same. DTCs coming up were random misfires of cylinders 1 and 2. Ran the car until the gas light came on and put in another tank of 91 octane, but a different brand from what I normally run. Car is running fine now without the hesitation between 2000-3000 rpm.
However, if you are chipped, the symptoms with bad gas will be magnified.

Andre

wasya152

what do you mean by stutter?

Drunk fool

The light acceleration is not completely linear, there is a little hesitation

Ari-TwinT3

check DVs