66 Pontiac Catalina Wagon part 83

In this rather slow video, we start to explore the anomaly. FOr those that don't know, at random the IAC will open without being commanded. Since the IAC does not provide any source of feedback tot eh computer, the Holley system closes it fully at startup, and then just remembers how many times it has screwed it out or in. If for any reason this relationship changes and the computer does not know about it, it will no longer understand how much bypass air is entering the engine. Other people have reported similar issues, and it is almost always either the IAC itself, or there is an RFI/EMI issue. In this video we try to gather more information, and start determining the cause. At the end, we have some positive results, but I do need to cold start and run this more before claiming victory!