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I have rough running until it gets warm then it has hesitation when accelerating

Tiny
REAON THOMAS
  • MEMBER
  • 1999 LINCOLN TOWN CAR
  • 12,000 MILES
I own a 1999 towncar and when cold, it runs extremely rough for up to 20 seconds, I try to give it gas to make it idle better but it only gets worst. Once warmed up it idle's fine but, when accelerating the car hesitates tremendously. Is there a way I can fix it myself. As of 2 months ago has new fuel pump, new coils, new oil, new filter, and was running fine after the tune up
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Thursday, October 13th, 2011 AT 1:14 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Have you checked the IAC and for vacuum leaks?
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Thursday, October 13th, 2011 AT 1:22 AM
Tiny
REAON THOMAS
  • MEMBER
  • 3 POSTS
Not 100% sure what the IAC is but I changed the idle control valve/sensor, and made no difference. Throughly checked all vacum lines and vacum connections but no visible problems. There.
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Thursday, October 13th, 2011 AT 3:23 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
IAC is the part you replaced, idle air control valve. If there are no leaks, make sure the IAC is getting power and the part is functioning.
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Thursday, October 13th, 2011 AT 3:41 AM
Tiny
REAON THOMAS
  • MEMBER
  • 3 POSTS
Thx will double check my installation.
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Thursday, October 13th, 2011 AT 4:31 AM

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