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A/C switch to defrost at 60-70 mph, cruise control not working

Tiny
TMAJ9447
  • MEMBER
  • 1997 DODGE RAM
  • 331 MILES
I have replaced all vac check valves, vac tested all a/c lines in cab including vac canister. I hear what sounds like a large vac leak when pressing the accelerator but can not track it down. New engine block approx 6K on it, sprayed around engine on change purs like a cat. I am at my whits end please help.
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Monday, December 19th, 2011 AT 9:56 PM

3 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Splice a vac gauge into line and watch what happens.
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Monday, December 19th, 2011 AT 10:47 PM
Tiny
TMAJ9447
  • MEMBER
  • 78 POSTS
Where do you recommend a good location to splice in a vac gauge, before check valve at manifold, after check valve, or other location. Also what am I looking for?
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Monday, December 19th, 2011 AT 11:52 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Splice into hvac line in cab pre controls.
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Tuesday, December 20th, 2011 AT 1:28 AM

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