Djet running way too rich... Still! Options

[Halfnelson]

Had a previous thread starting in 2022 about my 73 1.7 standard D-Jet running way too rich and flooding to the point where it wouldn't start. It's been an ongoing issue. I've had a go. 2 garages have had a go. I'm at the point where I'm beginning to lose hope.

A recap. Bought the car 2021, had a problem with intermittent flooding. So far have:
Checked MPS - holding vacuum.
Replaced CHT sensor and tested. Working when flooded.
Replaced fuel pump and tested pressure.
Replaced all vacuum hoses and tested for leaks.
Valves set and rechecked.
New 123 distributor.
New injectors.

Each time I think I've cracked it and it runs and drives - sometimes for a month or so. Then I'll go to start it and it'll flood again to the point where it contaminates the oil. I feel like I've never managed to get to the bottom of the problem. Just keep replacing parts. Thinking maybe a return line that intermittently blocks? I'm kind of at a loss.

[Halfnelson]

Got a package in the post yesterday from the US with an ECU and MPS from Jeff Bowlsby and fitted them immediately. Cleaned the plugs and did an oil and filter change. Then… moment of truth… the car fired up immediately, idled. Restarted a number of times. There have been quite a few false dawns and I hesitate to write this but I’m feeling optimistic this might have cracked it. Today, test drives. Once it’s stopped raining.

[ctc911ctc]

Jeff is the best - and despite his modesty, he IS THE EXPERT! (IMG:style_emoticons/default/beerchug.gif)

Got a package in the post yesterday from the US with an ECU and MPS from Jeff Bowlsby and fitted them immediately. Cleaned the plugs and did an oil and filter change. Then… moment of truth… the car fired up immediately, idled. Restarted a number of times. There have been quite a few false dawns and I hesitate to write this but I’m feeling optimistic this might have cracked it. Today, test drives. Once it’s stopped raining.