@husker posted:Buttondoor,
I may of misunderstood your post but did you have issues tuning Chuck's carb? I also have one of his carbs and have plug fouling issues.
No issues yet with Chuck's carb, it has literally been plug-and-play. But I had concluded that, worst case scenario, changing out fouled plugs will be a lot simpler and cheaper than trying to get my former (FAST EZ) EFI system to function properly given that it was repeatedly going to get inaccurate O2 sensor readings from a fouled O2 sensor (and those 4-plus wire O2 sensors aren't cheap, of course). We did follow Chuck's advice in his notes that come with his carb regarding things like type of plug, filters, etc.--I assume you would have done so, too.
My situation with that EFI was further complicated by my EZ model's not going into self-learning mode until 140 degrees of coolant temp as I recall, at least that. And my engine is slow to warm up to that. So in the meantime, even with new plugs and new O2 sensor, the first new cold start would be obviously just dumping fuel as I was having to baby the throttle to hopefully keep it alive. The whole tuning process for that model seemed to me to be doomed, at least with my particular unit, with my engine build, in a Pantera. But I will also say that once I began searching online for other users' experiences with that model to try to find some magic solutions, it became evident to me my issues were common. And our local auto electric guru who was knowledgeable about tuning various throttle body EFI systems had spent considerable time trying unsuccessfully to resolve the same sort of issues on a more standard American classic car and ultimately concluded it was an issue with that model.