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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,627
I had the same issue with my '79 with the boost guage pegging. Have you tried bench testing the wastegate to see if you can get the valve to open? In my case, the valve would not open, but air was leaking past the valve stem. When I opened it up, I found two springs in there. When I ran it with only one spring, it wasn't pegging the boost guage, but was not getting full boost due to the leakage at the valve stem. I sent it off to a machine shop and after looking at it, they said to toss it in the trash and get a new one. I put on a TIAL with a .8 bar spring and its regulating boost correctly and the factory guage seems to be reasonably accurate as well.

Old 01-21-2008, 04:17 PM
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