Throttle cut issue at WOT
#1
![Default](https://www.audiworld.com/forums/images/icons/icon1.gif)
Not long ago I had a very random problem while on a trip and at WOT or any boost for that matter, the throttle body would close completely resulting in my TBB to pop off. It was like that for about 3 days and couldn't go into boost at all (as little as 2 or 3 psi would cause it to close and the TBB would pop off). I noticed it was relative to my throttle input, because I could get up to 10 or 15 pounds if I was at half throttle or so, but then it would shut again. Checked the DV's, TBB (034 Motorsports), clamps, etc. and everything is fine mechanically.
I drove back home 200 miles in vacuum, checked the codes and nothing unusual showed up other than a MAP sensor fault (large vacuum leak, which I assume is from the TBB coming off). So I cleaned the MAP and MAF sensors and now I can get in to boost but as soon as I go WOT, there is a slight throttle cut before it gets going. And if I roll on the throttle slowly instead of just nailing it, it won't cut. I imagine it's a sensor issue rather than being mechanical but I'm kind of dumb founded as to what it is. I'm not sure if me cleaning the MAP/MAF sensors helped or if the car had cured itself on the way back home somehow.
Here's a video I tried to take of it happening, as soon as I say "WOT" I have my foot hard to the ground and you can notice the throttle cut as the camera abruptly jerks. Sometimes it's a bit more harsh depending on rpm (usually lower).
http://www.youtube.com/watch?v=kpbRjQ4qsLk
Thanks guys.
I drove back home 200 miles in vacuum, checked the codes and nothing unusual showed up other than a MAP sensor fault (large vacuum leak, which I assume is from the TBB coming off). So I cleaned the MAP and MAF sensors and now I can get in to boost but as soon as I go WOT, there is a slight throttle cut before it gets going. And if I roll on the throttle slowly instead of just nailing it, it won't cut. I imagine it's a sensor issue rather than being mechanical but I'm kind of dumb founded as to what it is. I'm not sure if me cleaning the MAP/MAF sensors helped or if the car had cured itself on the way back home somehow.
Here's a video I tried to take of it happening, as soon as I say "WOT" I have my foot hard to the ground and you can notice the throttle cut as the camera abruptly jerks. Sometimes it's a bit more harsh depending on rpm (usually lower).
http://www.youtube.com/watch?v=kpbRjQ4qsLk
Thanks guys.
Thread
Thread Starter
Forum
Replies
Last Post
N'Syncro
Parts For Sale - Archive (NO NEW POSTS HERE)
33
02-16-2020 03:12 PM
saifxnyc
A6 / S6 (C6 Platform) Discussion
9
11-30-2015 12:32 PM
Captain Rossness
Audi A3 / S3 / RS 3 MKII
26
09-24-2015 05:34 AM
jjcuff1
A6 (C7 Platform) Discussion
8
09-08-2015 12:02 AM