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Hello my truck is idling high around 12-1500 RPMs

Tiny
ICCOWBOY34
  • MEMBER
  • 1985 FORD BRONCO
  • 120,000 MILES
And when I throw it in drive it shuts off immediately. Any help would be appreciated. I tried adjusting the idle speed with the idle set screw however I cannot get it to the recommended 800 rpms it just dies out
Tuesday, May 22nd, 2012 AT 2:44 AM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
Check the hoses and intake manifold gaskets for a vacuum leak. That will cause an increase in engine speed without a corresponding increase in power.
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Tuesday, May 22nd, 2012 AT 2:46 AM
Tiny
ICCOWBOY34
  • MEMBER
  • 2 POSTS
Thanks for the help also I was wondering if there was anywhere to find a diagram on the vaccum lines without emission controlled devices. I basically just want to remove the emissions devices its going to be an off road truck
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Tuesday, May 22nd, 2012 AT 2:51 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
There's a diagram under the hood. It's the emissions sticker, often next to the hood latch. Removing that stuff won't gain you anything as far as power but it could affect engine performance, depending on what you remove.
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Tuesday, May 22nd, 2012 AT 3:26 AM

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