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boost & vac gauge reading low

Old 02-07-2005, 04:00 PM
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Default boost & vac gauge reading low

i have a cobalt autometer boost and vac gauge ... has a lil map sensor of its own... no biggy....
car idle =11in/hg
tap the throttle, up to 2k rpm, reads 4lbs boost...
i know it should be sitting at like -20 - 25in/hg at idle... and boost should jump up that high, that quick... esp at no load.... any help would be great!
Old 02-07-2005, 04:02 PM
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Default Re: boost & vac gauge reading low (Gsr_Hybrid_theory)

What does it read when the engine is off and in the IGN2 ON position?
Old 02-07-2005, 04:20 PM
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Default Re: boost & vac gauge reading low (IN VTEC)

after it goes thru its self check to 30in/hg 0
Old 02-07-2005, 04:34 PM
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Default Re: boost & vac gauge reading low (Gsr_Hybrid_theory)

Fascinating. Have you confirmed with a handheld vacuum/pressure gauge (ie: from like sears or autozone)?
Old 02-07-2005, 04:38 PM
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Default Re: boost & vac gauge reading low (IN VTEC)

no yet... but even w. the intake pipe to the intercooler disconnected, same thing....only thing i can think of would be a over sensitive gauge? i dunno
i disconnected a vacuum line going to the bov and it was lower... i guess i gotta get "better" vacuum lines
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