Accelerating off throttle?

[JB21]

Got a strange issue with the VRS TFSI when lifting off the throttle it feels like the car is still accelerating (boosting) slightly. Not an issue in every day driving but when really pushing on into a corner its the last thing you want when lifting off the throttle.

Tried contacting Shark performance where the car was mapped but nothing, I'm thinking maybe a sticking butterfly valve in the throttle body? Also the car does have what looks to me like an over sized intake for the size of the engine (2L) which runs from the back of the engine bay all the way around to the front so maybe this has something to do with it as there is a lot of cubic space within that intake and maybe its still pulling in air after lifting off?

Dunno, thoughts guys?

 

[White16valver]

Is it only doing it when on-boost? Does it do it before the turbo comes in? (or does it come in from about 1200rpm like all new turbo'd stuff seem to...)

 

[JB21]

Is it only doing it when on-boost? Does it do it before the turbo comes in? (or does it come in from about 1200rpm like all new turbo'd stuff seem to...)

Yeah only seem to do it on boost. Its more noticeable in a higher gear when planting the throttle. Not as bad when lifting off right near the rev limiter.

 

[White16valver]

Could it be something on the turbo not releasing boost quickly enough?

(Wastegate actuator thingy?)

 

[JB21]

Yeah could be mate. Its still on the original so maybe its starting to go. Good excuse for a k04 upgrade though.

 

[White16valver]

I like your thinking

 

[Danith]

Yeah could be mate. Its still on the original so maybe its starting to go. Good excuse for a k04 upgrade though.

there he is