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Van wont run at an idle until engine is warm

Tiny
CRAIG JASTER
  • MEMBER
  • 1999 DODGE VAN
  • 175,000 MILES
I just got this van last night and it runs good as long as the engine temp is at about 200-210 degrees. It has a little exhaust manifold leak and I'm wondering if an intake manifold crack or leak would possibly cause these symptoms.
Friday, February 10th, 2012 AT 3:28 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
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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Friday, February 10th, 2012 AT 4:16 PM

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