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1998 Honda Civic Honda Civic

Tiny
PAUL10301
  • MEMBER
  • 1998 HONDA CIVIC
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
When the engine is cold and I first start it the idle goes up to 2000 rpm. When the engine warms up a little it starts oscillating between 2000 and 1000 every second.
Tuesday, July 22nd, 2008 AT 7:25 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi paul10301,

The idle control system is malfunctioning and possible causes are

1. Clogged or stuck/faulty IAC valve.

2. Vacumn leakages.

3. Lack of engine coolant or clogged IAC valve coolant hoses.

Is the Check Engine Ligght showing?
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Wednesday, July 23rd, 2008 AT 5:32 AM
Tiny
PAUL10301
  • MEMBER
  • 2 POSTS
Yes, the Check Engine Light is showing.
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Wednesday, July 23rd, 2008 AT 3:23 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi paul10301,

Sorry for the late reply.

If the CEL is showing, you need to get a scan done to find out what is wrong with the engine management system.

Try your local Autozone outlet.
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Wednesday, July 30th, 2008 AT 4:45 AM

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