When to relearn the idle adjustment screw on an IAC?
If it looks like someone has messed with the idle adjustment screw perform the idle relearn procedure. Depending on the model you normally unplug the IAC after the engine is fully warmed up and adjust the idle screw until you reach base idle which is normally in the 700-750rpm range.
What does idle speech mean on a Honda Accord?
This one is more for a hunting or erratic idle, the original speech was for a ‘shaking’ or ‘rough’ idle. For that check out the other link about Honda idle issues or type ‘Idle Speech’ into the search function. Step 1 check for air in the cooling system.
When was the last time Honda idle issues were addressed?
This topic contains 9 replies, has 7 voices, and was last updated by Ariel 6 years, 11 months ago. PLEASE READ THIS FIRST BEFORE POSTING ABOUT HONDA IDLE ISSUES!!
Why does my Honda Civic idle too high?
When cold you just get an idle that is too high like up around the 1200-1500rpm range or higher. The second video shows a vacuum leak that I found on a Civic using a ‘safer’ method for checking for vacuum leaks. Both work but the important thing is that you check for vacuum leaks if you have a Honda idle problem.
What happens when the idle air control valve ( IAC ) fails?
When the idle air control valve (IAC) fails it can cause all sorts of issues; and in some cases may even render it undrivable. Usually, a bad or failing idle air control valve (IAC); will produce a few symptoms that can alert the driver of a potential issue:
If it looks like someone has messed with the idle adjustment screw perform the idle relearn procedure. Depending on the model you normally unplug the IAC after the engine is fully warmed up and adjust the idle screw until you reach base idle which is normally in the 700-750rpm range.
Can a bad IAC valve cause a surging condition?
A bad IAC valve can also cause a surging condition at idle, where the RPMs will increase and then drop back to normal. 2. Your check engine light is on: The computer monitors the IAC valve to make sure it’s working correctly.
Can a low RPM engine run with IAC disconnected?
I did not. The IAC looked VERY clean inside and there was no evidence of carbon buildup. The IAC is a valve that acts as a low rpm throttle and the passages into and out of the valve must be free flowing as well as the throttle in order for the IAC to properly control idle speed.