1989 Ford Bronco vacuum

1989 FORD BRONCO
93,000 MILES • V8 • 4WD • AUTOMATIC
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MIKEM367
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What is the proper engine vacuum at idle? I have a rough idle and the vacuum is running about 17-18in at idle. What should it be?
Aug 29, 2010 at 9:28 AM
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DOCFIXIT
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Hi
20 in is good is vacuum gague needle steady? does reading go up with slight throttle? Has compression been checked? engine timing good?
Let me know
Thanks for donate
Aug 29, 2010 at 2:40 PM
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MIKEM367
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The needle was fluctuating. I found some loose bolts on the intake manifold. thanks.
Aug 30, 2010 at 6:47 AM
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DOCFIXIT
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So that got it? running good?
Aug 30, 2010 at 2:02 PM
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MIKEM367
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Yes. I got this truck from a friend who said he recently rebuilt the engine so I should have known to go back over and check the torque on a lot of the bolts. All the intake bolts were loose. Some two turns loose as were the valve cover bolts. Running good now. Thanks.
Aug 31, 2010 at 8:27 AM
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DOCFIXIT
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Great news and good work
Aug 31, 2010 at 11:00 AM