21 hours ago, furypilot said:

It idles at 750 to 825 or so rhythmically.

Is this the current problem?

Or is it still doing this?  Can you summarize what you're trying to fix now?

On 1/15/2023 at 12:55 PM, furypilot said:

About a year ago it would just turn off while I was driving it.

 

I can live with it idling like it does. M biggest problem is lack of confidence that I will make it back to the garage. The last two trips ended up with a wrecker. Why does it run well for a while and then either stalls, stops or runs terribly and smokes a lot ? I think there could be an electrical component that breaks down with load or heat. The fuel tank is fine. Installed a new stock fuel pump and filter. I bought a new ICU, all new relays, cleaned the grounds. I am very open to suggestions or ideas. I brought it to a local sports car shop. They have a very good reputation but if the tech can't hook a computer to it they don't know where to turn. Thank you for your post.

Curt

1 hour ago, siteunseen said:

After reading more it sounds like you're onto something electrical related? I was just thinking of some easy things to check first. Here's the AAR plug-in and one of the best helps I've gotten for my '77 280. Good reading with lots of photos. Hope you get it figured out soon.

http://atlanticz.ca/zclub/techtips/aar/index.html

http://atlanticz.ca/zclub/techtips/EFI&fuel.htm

http://atlanticz.ca/zclub/techtips/

Thank you for all the helpful info I really appreciate it. Looks like I've got a lot of reading to do. I will post the results.