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Surging when driving or Idle
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mercougar
New User
Feb 29, 2012, 8:27 AM
Post #1 of 2
(1261 views)
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Surging when driving or Idle
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1995
mercury
cougar xr7
4.6
car had set up a cpl weeks but was not having any problems.when I went to drive it again it started surging while idle and while driving.I have done nothing yet.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 29, 2012, 8:31 AM
Post #2 of 2
(1252 views)
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Re: Surging when driving or Idle
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First eliminate all vacuum or air leaks in the system. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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