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]

Although the cht has been changed and I’ve tested it a couple of times, once when running ok, once when it wouldn’t start, I have an another new one to swap in. I’m also going to test it from ecu plug 23 to see if it’s something in the wire.

Re rich running, I think the car is running too rich generally. I swapped out the plugs and they were black and sooty. I guess it could be flooding when I turn the engine off? Hadn’t thought of that. It sometimes stands for a week or two and then I go to start it and it doesn’t even try to fire, it just cranks with no attempt to fire up, not even a splutter.

When it does fire it fires first crank… like the moment I turn the key from the pump priming to the starter.

[ClayPerrine]

Although the cht has been changed and I’ve tested it a couple of times, once when running ok, once when it wouldn’t start, I have an another new one to swap in. I’m also going to test it from ecu plug 23 to see if it’s something in the wire.

Where and when did you get the CHT? The current batch of aftermarket ones are having issues....

http://www.914world.com/bbs2/index.php?showtopic=360631

Hope that helps.