Boost problems

2009 CHEVROLET COBALT
110,000 MILES • 2.0L • 4 CYL • TURBO • 2WD • MANUAL
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DAMIEN QUIGLEY
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  • 1 POST
My turbo is spooling very slowly and only builds to 11-12 PSI when my normal is 15-18, if I go wide open especially in 4th, it loses boost across the range and only builds to 2 or 3 lbs.
Mar 3, 2022 at 1:26 PM
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ASEMASTER6371
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  • 52,796 POSTS
Good afternoon,

Do you have any codes stored?

Here is a guide that will help with pulling codes if you need it:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Good chance you have a bad wastegate that is built into the turbo.

First, look for any loose or broken clamps from the turbo to the CAC or charge air cooler. A leak will result in a low boost.

The other option is the turbo itself has failed.

Do you have an extended warranty?

Roy
Mar 3, 2022 at 2:34 PM