Quote:
Originally Posted by johnson
it runs perfect before boost... but once it starts boosting it just sounds like a lot of backed up exhaust built up... and no boost reading or goin through... but once you get up on rpm.... it starts to read a little boost...
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Pull your intake and check your turbo for shaft play.
Another "test" is you can temporarily unhook your wastegate and CAREFULLY watch your boost. You should build boost and very quickly without boost control.
DO NOT let it swing past 15psi as that is all you need for the test.