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Old 08-14-2013, 03:51 PM   #1
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Default 1999 gtp low boost

I have a 1999 grand prix gtp that is only getting like a 1/3 of its boost. I had it scanned and it says bypass solenoid. So do i need just the solenoid or the bypass valve also? Which one goes bad more often? I went and revved it up and the arm on the valve DOES move so whats that mean i need? Thanks
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Old 08-14-2013, 04:20 PM   #2
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ok i just unhooked the solenoid and blocked the line running to it and left the line open for the bypass valve and now i have great boost. So that tells me i just need the solenoid right?
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Old 08-14-2013, 07:40 PM   #3
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Starting multiple threads of the same question across the forum only causes confusion. Please continue posting in your other thread please.

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