Under boosting

[turbo03]

I was wondering if anyone had any ideas why my car isn’t building boost. I’ve checked all the vacuum lines and I have ordered new boost solenoids but it randomly started acting up last night. Here’s a screen shot of the log from this morning.

[PerformanceEngSolutions]

Originally Posted by turbo03

I was wondering if anyone had any ideas why my car isn’t building boost. I’ve checked all the vacuum lines and I have ordered new boost solenoids but it randomly started acting up last night. Here’s a screen shot of the log from this morning.

Can you show us a log of your wastegate duty cycle? Are you able to perform a smoke test to check for boost leaks. If you don’t have any leaks and your wastegates are working properly then it’s possible the turbos are on their way out?

If you have an exhaust leak pre turbo then that could prevent you from building proper boost. I think that’s unlikely but you might as well smoke test the exhaust system since you mentioned a loud exhaust sound in your other thread