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1989 Ford Bronco vacuum

Tiny
MIKEM367
  • MEMBER
  • 1989 FORD BRONCO
  • V8
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
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?
Sunday, August 29th, 2010 AT 9:28 AM

5 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
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
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Sunday, August 29th, 2010 AT 2:40 PM
Tiny
MIKEM367
  • MEMBER
  • 10 POSTS
The needle was fluctuating. I found some loose bolts on the intake manifold. Thanks.
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Monday, August 30th, 2010 AT 6:47 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
So that got it? Running good?
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Monday, August 30th, 2010 AT 2:02 PM
Tiny
MIKEM367
  • MEMBER
  • 10 POSTS
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.
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Tuesday, August 31st, 2010 AT 8:27 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Great news and good work
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Tuesday, August 31st, 2010 AT 11:00 AM

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