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low boost at wide open throttle

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tjmbsn

Post subject: low boost at wide open throttle

Posted: Fri Feb 18, 2011 12:16 am

Joined: Fri Feb 18, 2011 12:10 am
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Name: Tyler

greetings fellow pontiac enthusists. my name is tyler. ive owned pontiacs almost exclusivley since 1989. i have a 1985 trans am, and a 2007 grand prix. i am joining the forum today to try and solve a problem i've recently encountered. my grand prix will not reach full boost at wide open throttle. i was wondering if there were any places i needed to look prior to taking it to a mechanic. any advise appreciated. thanks

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Milestone

Post subject: Re: low boost at wide open throttle

Posted: Fri Feb 18, 2011 12:27 am

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Joined: Sun Dec 30, 2007 9:21 pm
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Name: Marcus

Check your tensioner, idlers, and look for signs of belt slipage.

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hotrodolds

Post subject: Re: low boost at wide open throttle

Posted: Fri Feb 18, 2011 10:46 am

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Joined: Fri Feb 15, 2008 10:53 am
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More than likely, the BBV, or Boost ByPass Valve, has failed.

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Biohazed

Post subject: Re: low boost at wide open throttle

Posted: Fri Feb 18, 2011 11:21 am

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Name: Chris

also could be a vacuum leak or clogged up cat. ran into that with my GTP when I first got it .

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dsh1106

Post subject: Re: low boost at wide open throttle

Posted: Fri Feb 18, 2011 3:45 pm

Mr. Obvious

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Welcome

Sounds like BBV or the BBV selinoid.

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Kyle_99_gtp

Post subject: Re: low boost at wide open throttle

Posted: Sat Feb 19, 2011 12:22 am

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Joined: Sat Dec 29, 2007 12:24 am
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Name: Kyle

Yep, sounds like a BBV problem to me.

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