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The car is in park at idle run's fine give it.

Tiny
JOLIFAEM
  • MEMBER
  • 2001 MERCURY MARQUIS
  • 99,000 MILES
The car is in park at idle run's fine give it some gas and it run's rough give it a bit more gas and it smooth's out like a dead spot in the throttle same when driving
Saturday, December 8th, 2012 AT 1:01 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Check for vacuum leaks and check for tune up
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Saturday, December 8th, 2012 AT 1:50 AM
Tiny
KANDRZIN
  • MEMBER
  • 4 POSTS
Same thing is happening to my 1995 Grand Marquis with 242.000 and I just had a tune-up. I will look for vacuum leaks and in fact considered this as a problem. Might it also be a problem with a blocked air intake or a blocked fuel injector?
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Monday, December 31st, 2012 AT 5:34 PM
Tiny
KANDRZIN
  • MEMBER
  • 4 POSTS
Actually, the roughness happens at idle and smooths out with higher revs, which is a little different from JoLiFaEm's problem.
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Monday, December 31st, 2012 AT 5:35 PM

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