It seems the range of control on my IAC is out of whack with the needs of my motor. I adjust the IAC and throttle blades so the IAC barely bounces on the bottom of the graph while the engine is hot and the car in neutral. I set idle speed about 950 to 1000. Drop in gear and the idle maintains 950 and the IAC control is right in the middle of the range, right where it needs to be. Now when the engine is cold and it starts up the IAC goes wide open and I have poor starting and very low idle. In fact it has a very hard time staying running at all. There is no way on the throttle body to enlarge the feed hole any further due to the way it is drilled. It just seems as if I need more total CFM. That or I have something somewhere out of whack. I am 99% sure the IAC is fully open as I have visually checked it and also can hear the ariflow as it opens and closes. Plus you can feel it when you put your finger over the hole, of course.
Any thoughts or similar situations out there?
Any thoughts or similar situations out there?