Does anybody have any ideas for my 2002 2.5 v6 tdi quattro sport? It seems to have an overboosting problem, it fact 'seems' is a little understatement as when it was on diagnostic computer last week the boost pressure peaked at 36psi!!!!!
The car starts and drives fine, boost is all good until you reach 2250-2500rpm, and then the turbo reacts as if youve released the throttle, dumping all the boost, presumably through the wastgate.....
In 4th, 5th and 6th its as if there is no boost at all
The hoses and vacuum pipes are all good, the diagnostics showed no faults and im running out of ideas and patience. I have changed the thrust sensor on the LH intercooler and the boost valve which carries the vacuum pipe to the actuator and dump valve. I have also changed the RH intercooler which started to leak badly(not sure if this was a result of the overboosting problem or was already there)