2CarPros - Car Questions & Answers

Honda Civic Repair Question


Topics covered: Sensor, Body, Coolant.
Mileage: No information provided.

Asked on April 26, 2006

Rough idle when engine is code and warm

When i start up my 95 civic ex the idle jumps up and down from 1000-2000 rpm on cold start...and on warm start it jumps from 1000-1500...so i dont know whats wrong with it
Avatar Asked by skadaloz

Answer

Replied on April 28, 2006

I call this surging and there are a number of issues that can cause it. If it happens all the time, would suspect the throttle body's IAC valve or a sticking air flow sensor. Another cause is the coolant level is too low or has air in the system. Try bleeding the system at the two bleeders. Is there a check engine light on? Gently tap the sensor that is located directly across from the throttle linkage. That is the air flow sensor. The IAC valve is located on the throttle body and could be taken off and cleaned. Coolant runs throught this rascal.

Tiny Answered by Bruce Hunt (expert)
3,803 answers provided