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Discussion Starter · #1 ·
After my turbo timer shuts my car down I hear a "Groan" coming from under the hood. Is this normal or is this the groan that Ive herd about? (AKA: Somthing about a reed valve???)

97 Supra TT
FMIC
BOV
FCC
DWN Pipe
Exhaust
Intake
Profect B Boost C. (14, 18)
 
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Discussion Starter · #3 ·
Does it make any difference if the AC is on or not? I get a hiss on my old Celica if I shut it off with the AC still on. How long does this groan last?
 
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