Having problems with your Honda Civic ?
1998 Civic, Cold start, idles fine. When car is warm idle speed increases then decreases over and over again from about 600 rpm to 1100 rpm. once warmed up and driving throttle becomes on-off switch...motor accelerates and slows depending on throttle opening. runs smooth until I get stuck in traffic or a long stoplight. I shut motor off when coasting or at rest, re-start, runs smoothly again. Problem increases when weather is at or above 40 degrees F.
Repair Help & Product Troubleshooting for Honda Civic
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