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Is my boost gauge going bad?

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Old 03-14-2012, 02:33 PM
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Default Is my boost gauge going bad?
Lately I've noticed that when I first start my car in the morning my boost gauge reads 20" of vacuum. When I've been driving for awhile and pull to a stop light my gauge is bouncing from 14" to 16". Car is running fine and I can't see (rpm) or feel any difference in the car. I'm using AEM's digital boost gauge. Any ideas?
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Old 03-14-2012, 03:21 PM
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Hmm. Kinda weird. Ussually vacuum increase as car warms up to operating temp and revs drop to idle. Do u see more then 20 vacuum on decel in gear? What rpm do u idle at?
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Old 03-14-2012, 04:05 PM
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After my initial start up I don't see over 20" I believe my idle is around 900. Don't quote me on that. I need to pay more attention to it tomorrow.

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Old 03-15-2012, 05:02 AM
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This morning my car was running 18" of vac and when I would down shift it would climb to 20"
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Old 03-16-2012, 03:24 AM
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idle is 900rpm
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Old 06-20-2012, 04:54 PM
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Old thread but does anyone else see a fluctuation in vacuum with hotter temps?
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Old 06-20-2012, 05:09 PM
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Aem's gauge is gay. It only reads in 2's in vac. So it bounces back and forth indicating around a 17.
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Old 06-20-2012, 05:25 PM
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I see as low as 14 when car has been running for an hour. Sometimes with a rough idle and sometimes without

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Old 06-20-2012, 06:47 PM
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Originally Posted by teamvalorracing
Aem's gauge is gay. It only reads in 2's in vac. So it bounces back and forth indicating around a 17.
??? mine shows 21 20 19 lol... i know cuz my vac was at 21 today when i started my car up
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Old 06-21-2012, 12:03 AM
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Originally Posted by seoul2k
Originally Posted by teamvalorracing' timestamp='1340240946' post='21798871
Aem's gauge is gay. It only reads in 2's in vac. So it bounces back and forth indicating around a 17.
??? mine shows 21 20 19 lol... i know cuz my vac was at 21 today when i started my car up
Weird... I only see even numbers counting by 2'a

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