1997 Honda Civic Idle Surging

HONDA CIVIC
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MORFFIN
  • MEMBER
  • 2 POSTS
My son owns a 1997 Honda civic. A new (used) motor was just put in and now the engine surges when idling. Otherwise it runs good. All codes have been checked and new sensors put in (about 5). Any ideas on what could be causing the surging?
Apr 9, 2006 at 12:21 PM
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TIMINGISEVERYTHING
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  • 17 POSTS
One of 4 things can cause this:
1. Intake manifold gasket
2. Throttle body gasket
3. Fuel pressure regulator is bad
4. Torn/disconnected vacuum line
Apr 12, 2006 at 10:25 AM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
Intake manifold gasket is bad.
Apr 12, 2006 at 3:10 PM

Suggested Repair

Replace the intake manifold gasket, which the expert identified as the cause of the idle surge.

Conversation Summary

A 1997 Honda Civic surges at idle after a used engine was installed, but otherwise runs well. Codes were checked and several sensors were replaced. Possible causes mentioned included intake manifold or throttle body gaskets, a bad fuel pressure regulator, or a torn or disconnected vacuum line. The expert concluded the intake manifold gasket is bad.

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