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1998 Honda Civic idle bumps

Tiny
NMG
  • MEMBER
  • 1998 HONDA CIVIC
  • 1.6L
  • 4 CYL
  • FWD
  • AUTOMATIC
When I start the engine idles normal but when shift into drive the idle jumps up and down almost to stall even while driving and coming to a stop when fully sopped the idle jumps up and down.
Saturday, August 2nd, 2014 AT 5:01 AM

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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Saturday, August 2nd, 2014 AT 6:37 AM

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