So the turbo the other day just seemed to stop trying as hard and is only boosting half of usual... I have a MBC on it so dont think thats it and pretty sure its not a boost leak because the turbo just doesnt spool hard. Anybody with a filter stuck on the turbo knows what sound I'm talkin about and its just not there. Wastegate doesnt seem to be sticking open... Any ideas???
Clogged exhaust?
A weak wastegate actuator??