Proper vacuum at idle on a 1998 Tahoe 5.7L

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Feb 3, 2006 | 07:33 PM

fastta

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Launching!

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From: Clearwater, FL

Proper vacuum at idle on a 1998 Tahoe 5.7L

What should the vacuum be at idle on a 1998 Chevy Tahoe 5.7L Vortec?

Feb 4, 2006 | 08:34 AM

fastta

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Launching!

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From: Clearwater, FL

Anybody know. Trying to chase a possible vacuum leak.

Feb 4, 2006 | 10:13 AM

James B.

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From: 33.91° -117.48°

With all accessories turned off and the engine up to temp it's about 18"hg.

This changes with coolant temperature and load. The more load the less vacuum.

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