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Vacuum Reading At Idle?

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Old 02-09-2004, 07:09 AM
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Okay. My Autometer boost gauge reads about -18 at idle when the engine is cold. When its hot, it reads -12. I'm guessing this is due to worn internals. Anybody have numbers to compare these to?
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Old 02-09-2004, 10:24 AM
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mine did about -12/-13 or so when it was stock 13bt warm
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Old 02-09-2004, 10:29 AM
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Originally Posted by j9fd3s' date='Feb 9 2004, 11:24 AM
mine did about -12/-13 or so when it was stock 13bt warm
So, that behavior doesn't sound aberrant to you, given an ambient temperature around 40 degrees Fahrenheit and 20W50 oil?
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Old 02-09-2004, 10:32 AM
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yeah seems ok to me
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Old 02-09-2004, 10:36 AM
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I dont trust my autometer anymore as it reads about 2psi when the car is turned off.



My MAP sensor shows about 15" Hg at idle though.
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Old 02-09-2004, 10:36 AM
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I guess I'll just change the oil and beat on it some more.
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Old 02-09-2004, 10:38 AM
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Originally Posted by 1988RedT2' date='Feb 9 2004, 11:36 AM
I guess I'll just change the oil and beat on it some more.
Thats always a good solution to fixing problems
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Old 02-09-2004, 10:41 AM
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Originally Posted by adamlewis' date='Feb 9 2004, 11:38 AM
Thats always a good solution to fixing problems
Sooner or later, with enough 1/4-mile runs, something will break that I will be able to diagnose.
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Old 02-09-2004, 04:31 PM
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I get about 12-14
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Old 02-09-2004, 04:34 PM
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Originally Posted by Dramon_Killer' date='Feb 9 2004, 05:31 PM
I get about 12-14
Cool. Thanks for the info!
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