2008 hhr ss not making boost
Senior Member
Joined: 06-07-2011
Posts: 2,180
From: SE Mich
Um, 20 psi is too high for stock setup.
How many miles? Mine did that after jumping timing, and shortly before blowing. You should see 17 max. If you see 21, it's a red flag.
You might want to get your timing checked. Soon.
How many miles? Mine did that after jumping timing, and shortly before blowing. You should see 17 max. If you see 21, it's a red flag.
You might want to get your timing checked. Soon.
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