Cobalt SS Network - Reading boost while turned off

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stevenwhaley89

03-09-2014 08:43 PM

Reading boost while turned off

When my car is idling, the boost gauge reads 0psi. normal. when i turn my vehicle off and turn it to AC power, the boost gauge will load up and show about 1.5psi of boost. Even from a cold start in the mornings, i'll turn on the AC power and it shows boost pressure. is this normal?

kzak104

03-09-2014 08:50 PM

When you car is idling it should be reading 18-20 hg of vacuum.

ItalianJoe1

03-09-2014 09:18 PM

Sounds like a bad gauge if anything, what gauge?

stevenwhaley89

03-09-2014 10:10 PM

I have one of those RPD's. and it's on the boost gauge where it will show about 1.5psi of boost pressure when my car is off

kzak104

03-09-2014 10:27 PM

Oh. If you have the rpd then it doesn't show vacuum.

It's probably normal. Someone with it will probably chime in to confirm

KonnerTomlinson

03-10-2014 02:06 PM

Mine shows 0.0 at idle and when powered on but engine off

SSlobalt

03-11-2014 06:54 PM

Tmap

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