Surging

Tiny
OLDGUY194712
  • MEMBER
  • 1994 CHRYSLER LHS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 24,500 MILES
What would cause a 3.5 engine to surge will go from 800 rpm up to 1200 rpm when warmed up
Friday, February 18th, 2011 AT 10:05 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and 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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Friday, February 18th, 2011 AT 11:23 PM

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