1998 Honda Civic honda civic

1998 HONDA CIVIC
80,000 MILES • 4 CYL • 2WD • AUTOMATIC
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PAUL10301
  • MEMBER
  • 2 POSTS
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.
Jul 22, 2008 at 12:25 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 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?
Jul 22, 2008 at 10:32 PM
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PAUL10301
  • MEMBER
  • 2 POSTS
yes, the Check Engine Light is showing.
Jul 23, 2008 at 8:23 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 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.
Jul 29, 2008 at 9:45 PM
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