1998 Honda Civic Up Down Idling

82,000 MILES • 4 CYL • FWD • AUTOMATIC
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LEE7255
  • MEMBER
  • 1 POST
Just replaced timing belt and water pump on a 98 civic dx engine d16y7. Car starts and sounds great but after engine warm up and in park idle goes up down and continues this .Took for a drive and runs great but idles a little high in drive.Put in park idles up and down and continues this.Could this be something with the coolant or cooling system.
Oct 12, 2009 at 1:27 PM
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BIG_JAY
  • ✓Experienced Mechanic
  • 121 POSTS
It is a bad Idle air controler (IAC). It is searching for the right idle but it can not find it.
Oct 12, 2009 at 1:45 PM
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