Hello,
im looking for some advice. I just bought an A4 tdi and it doesnt seem as if the turbo is boosting!
I have pulled the hoses off on both sides of the intercooler and you can feel the air when you rev the engine up but I drove the car with the pipes disconected and its the same as when they are joined back up!
I have checked for play on the spindle inside the turbo and there is no free play and it sounds like its boosting when the pipes are off but no turbo sound when the pipes are back on and no power!
I have disconected the sensor on the air filter and that made it worse which makes me think that that sensor is working ok!
Any advice would be much appreciated thanks in advance!