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Discussion Starter · #1 ·
Hello 04 s60r 150k 6 speed, bone stock but properly maintained (according to the records).
I just recently added a boost gauge and I'm only getting 7 lbs of boost. Sometimes It will spike to 8 or 9 after a shift but maintains 7 all the way through the rpm band. No check engine light or codes ever in my ownership. I've checked all charge connections and vac lines. Reset the ecu and unplugged the tcv. All with the same 7psi smooth pull. Is the tcv just junk? Any help is appreciated. Thanks.

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7 sounds like wastegate preload. Are you 100% sure all lines are connected correctly on the TCV?
 

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Discussion Starter · #3 ·
Yeah just pulled the air box traced all the lines back nothing out of place. Unplugging the tcv does nothing different.

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Do you have 12V at one of the TCV pins with ignition on?
 
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