09-05-2015, 12:40 AM
Was riding in stop and go traffic yesterday. Temperature was only in the mid 70's, but due to the extended time spent not moving the engine seemed to get pretty hot. I was not too concerned because I use Honda 10w30 full synthetic motor oil and believe that my engine was as well-protected as it could be. Suddenly the engine died at a stop light. It restarted easily, but it would not idle. The ide speed dropped to about 500 RPM (this is what the tachometer said). Every time I stopped the idle speed would drop to about 500 RPM and then the engine would just stall, unless I opened the throttle enough to bring the RPM up to normal idle speed. I rode a few miles on the freeway at a relaxed speed to cool the engine so I could determine if the condition was caused by over-heating but this did not cure the problem. Has anybody experienced a similar problem? I am looking through my service manual now and I'm thinking it might be the Idle Air Control Valve (page 5-74 of service manual). Any suggestions from somebody with experience with this condition are greatly appreciated.