(not a) $leeperA4

<center><img src="http://pictureposter.audiworld.com/34457/turbochargerwarning.jpg"></center><p>
Here is the problem:
While accelerating (1/2 to full throttle) and i lift my foot off the gas, stayin in current gear, i hear the bypass valve (as i should) and the car shutters violently actually causing the front of the car to dip more aggesively than usual. For instance i am in 2nd gear this morning, accelerating from 5-25 more than 1/2 throttle and someone pulled out so i took my foot off the gas, stayin in gear and the car violently shuttered.

When accelerating 3/4 throttle, in 2nd and 3rd gear boost seems to hesitate and struggle around 3200-4000rpms and u feel the car hesitate and you feel the loss of hp and tq. Does not seem to happen in 4th and 5th.

Also when lightly accelerating and shifting before the boost comes in the car does not shutter.

Also, while driving the fine line between low boost and high, somewhere around .5-.8 bars in 2-3rd gear doin around 40, 1/2 throttle, the bypass valve goes nuts and dumps, then boost comes back then dumps in a matter of seconds.

Then while under high boost WOT and quick shifts/ (1st through 5th, 0-80mph) aggresive driving there is NO shuttering or violent movement.

The feeling is that the engine is slamming into the firewall or there is a mount all fawked up causing the engine to shift. I know this may not the case but i am tryin to describe the feeling.
The movement is extrememly violent and disturbing, the CEL came on also.

History:
car sat for 3 weeks, while i installed a full audio system. battery was disconnected.
Brand new front suspension: control arms, shocks/springs: bil./ h&amp;r etc.
Ko3 with APR chip, exhaust, SS, N75, Baileys BYpass.
57k miles

TIA!!!!!!!

JAFO

the engine movement sounds like a bad snubb mount. there are several aftermarket units available. the other problem sounds like a bad bpv. the tt valve is $30-35 at the dealer.

RKA

Did you use a vag.com to run a TBA after you got the battery hooked up?

(not a) $leeperA4

Nah, can i do the TBA without a VAG?

ModifiedA4

let sit for 3mins. then start and let idle for 3mins.

FoKai

you're supposed to hear some clicking noise (although i never did hear any). better method is to use the vag-com software from ross-tech to do the TBA. you can actually hear the throttle body reset itself.

RKA

do NOT touch the gas pedal when doing this

ModifiedA4

umm you dont want to touch the pedal. that defeats the whole purpose of a tba