Overboost/Throttle

Callumnash

Member
Joined
Jun 16, 2021
Location
Barnsley
TDI
Audi A3
Can someone please shine some light on my problem,I bought an Audi A3 2005 2.0 Tdi 140BHP (BKD) and I’ve got a dreaded overboost problem…I’ve had the turbo reconditioned and everything cleaned professionally I thought that cured it until I took it on a drive and realised when I was climbing the gears it put me in limp mode and came up with an overboost condition!! Secondly I’ve plugged a computer into the OBD port and my throttle position is stuck at 95 and won’t move when pressing the accelerator I’ve changed the throttle body which wasn’t cheap and still no luck!
 

Callumnash

Member
Joined
Jun 16, 2021
Location
Barnsley
TDI
Audi A3
Thanks for your reply,I changed the pedal with the old throttle body and the car chucked a fair few codes up,maybe I should try it now I have a new throttle body?
 

BobnOH

not-a-mechanic
Joined
May 29, 2004
Location
central Ohio
TDI
New Beetle 2003 manual
If the TPS was stuck on 95%, the car would rev high as soon as it's started. So I would suspect some wires are crossed, mis-plugged or damaged.
 
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