How do you fix high low idle

Thanks for your quick response. I thoroughly cleaned the inside the throttle body with carb cleaner, brush and shop rag. Throttle works freely now.

No check engine light on to indicate a problem, but I have not flashed the computer with scan tool.

I resolved my low/high idle issue today and I want to share my success with your readers. Here is what I believe happened in my situation. When I cleaned the butter fly with carb cleaner, some of the cleaner made its way into the idle control valve and loosened some of the gunk and cause the idle valve to stick in the open position. When I took it off to clean it, I removed the electronic part held down by the five point screws in order to have better access to the Phillips head screws holding the idle valve to the under side of the throttle body. It is impossible to correctly position the electronic part back onto the idle control valve shaft because it is magnetized and the shaft will rotate and cause the metal ear on the shaft to turn and miss the slot in the body of the electronic part. If misaligned, the shaft will held in the open position and a high/low condition will result. When installing the electronic part onto the idle control valve, it has to be done off the throttle body. In order to align the shaft in the correct position, I used the slanted ends of a wooden cloth pin to keep the shaft from moving while I install the electronic part onto the idle control valve. Once the electronic part was fasten to the idle control valve, I tested it to make sure it was operating properly by plugging it into the plug on the car and then turning the key in the on position without starting the car. If working properly, you could see the valve flutter back and forth one time each time the key was turned on. You could also feel the valve hum when the key was turned on. Of course, you need a friend to turn the key while you hold the valve in your hand.

I was also under the impression that the valve rotated like a motor when it only flutters back and forth and does not turn all the way around. Please share this with your readers and this tip will save the shade tree mechanic a lot of time and money. I lost two days of my Christmas vacation, but I probably saved 300 bucks for my efforts. I learned much in the process. I also have to give my brother the credit for the fix because he is the one who helped me diagnose the problem.