GM tech
New member
Over the last few weeks I've noticed my boost pressure is not getting to normal levels and is building up alot slower.Last week in an effort to fix this problem I replaced the cat and muffler with a high-flow converter and magnaflow muffler hoping the 13 year old parts would be the source of the problem.This did not help at all.
When I bought the truck it had been stored for nearly 5 years,it had 13,053 miles when I got it and ran like a champ with the exception of a slight off idle hesitation.I'm at nealy 18,000 and the last oil change(15,500 miles) the drain plug had more material on it than I was comfortable with and it is getting lazy out of the hole.The boost controller is set to 14.5 psi(1.0 on the controller dial).My boost gauge reads 12ish psi. when it peaks then it falls off to about 10 psi.I checked the wastegate actuator and it holds vacuum,and there are no vacuum leaks.
Could this be the beginning of a turbo failure????
I not driving it at this point,it is getting worse as time goes on.Any advise would be great....
When I bought the truck it had been stored for nearly 5 years,it had 13,053 miles when I got it and ran like a champ with the exception of a slight off idle hesitation.I'm at nealy 18,000 and the last oil change(15,500 miles) the drain plug had more material on it than I was comfortable with and it is getting lazy out of the hole.The boost controller is set to 14.5 psi(1.0 on the controller dial).My boost gauge reads 12ish psi. when it peaks then it falls off to about 10 psi.I checked the wastegate actuator and it holds vacuum,and there are no vacuum leaks.
Could this be the beginning of a turbo failure????
I not driving it at this point,it is getting worse as time goes on.Any advise would be great....
