Why does a 1987 GMC Safari idle really high most of the time?
The idle is controlled by a device called "IAC motor". It's located on the throttle body. It can be either extremely dirty or just inopperative.
Your 1987 Honda fourtrax idles high you'v tryed rebuilding the carb but it didn't helpwhen it starts you can make ajustment on the carb idle ajustment but it alway returns to a high idle any help woul?
You don't. The ECU controls the ISC (Idle Speed Control Motor) which adjusts the idle. If idle is out of control (too low or too high) try gently tapping the ISC with a small (0.5 pound) hammer or a large wrench while the engine is running. If tapping the ISC makes a change in idle speed, you need a new ISC. Clean the throttle body whenever replacing the ISC. If the ISC is not the…
What would cause my car to idle around 2500 rpm in 2006 Chevy cobalt I put in a new throttle body and took to dealership to relearn idle but idle is still high?
to turn on the high idle you must run a wire to the ecm /www.kennedydiesel.com:.webloc if you go to this link it will give you the instructions to do it. I did it on my truck and it works great !!! if you have a car starter with an available output you can connect it through that and run you high idle from that.
A vacuume leak at the intake manifold or vacumme hose can cause a high idle. On carbuerated vehicles the idle adjustment screw may be set to high. On fuel injected vehicles, the Idle Air Control(IAC) circuit or valve may be faulty. On newer vehicles you may be able to get a trouble code to help pinpoint the problem. Chris