I have just installed a 408 with a FAST truck intake, 46 lb/ hr injectors and 102 mm throttle body. I am having some trouble at idle. Specifically, I have to hold it at about 1400 RPM to warm it up. Once it is about about 130 F it will idle correctly. I believe the IAC does not do anything until it gets this warm which I think is odd because it should be active immediately. Please take a look at my cal and give me some input. Thanks.