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Engine high idle?

Tiny
ETIENNE1
  • MEMBER
  • 1998 HONDA CIVIC
  • 4 CYL
  • FWD
  • MANUAL
  • 260,000 MILES
Hi I have a 1998 honda civic si (canadian) with 260000kms, the motor has been changed about 2 years ago, the car just started idling funny, it idles between 1000rpm then jumps to 2000rpm and this repeats over and over, the check engine light is not on. The car still drives very good with as much power as before, its just idling bad, could this be a sensor?
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Tuesday, September 16th, 2008 AT 3:11 PM

4 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Etienne1,

This should not be a sensor problem. Check for vacumn leakage and a stuck IAC valve.
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Thursday, September 18th, 2008 AT 3:03 PM
Tiny
ETIENNE1
  • MEMBER
  • 3 POSTS
Ok ill check to see if there is a vaccume leak, if the iac valve is stuck does it need to be replaced?
Thank you very much
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Thursday, September 18th, 2008 AT 3:42 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Etienne1,

If the IAC is stuck, high possibility you need to replace it. I always try to clean it with carb cleaner then use some lubricants to try to get the valve moving, the end bearings are not easy to lubricate. DO NOT disassemble as the factory settings will be disturbed resulting in inaccurate operations.
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Friday, September 19th, 2008 AT 8:41 AM
Tiny
ETIENNE1
  • MEMBER
  • 3 POSTS
Thank you I cleaned the valve and the car idles correctly,
thanks again for ur help!
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Tuesday, September 23rd, 2008 AT 3:23 PM

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