Car stalling AGAIN, Updates- none of them good. Options

[rjames]

Drove around for 30 minutes in 80+ degree weather. All arterial roads, so several stop lights, etc. No problems until I was almost home. Car stalled when I stopped at a light. RPMs just dropped to zero. Was able to start it again with a little difficulty and had to keep my foot on the gas to keep it from stalling out again. Power seemed ok though the rest of the way home (I think). It stalled once again at a stop light a couple of blocks from home and then again when I pulled in the driveway. I let it sit for 30 seconds, started it again and it idled just fine. Rock solid at 1000 RPMs. Pulled it into the garage where it sits now.

Prior to today the car has been running and idling perfectly since I went through the FI parts last year, which included installing a 123 distributor, new CHT sensor, a newly rebuilt mps (calibrated for correct afr on my engine), new vacuum hoses, NOS throttle body, rebuilt injectors, new fuel pump, valve adjustment and timing.

I haven’t checked the AFR since last year, not sure why it would change though.
It’s a ‘75 so the fuel pump is in the front, so I can rule out vapor lock I think.

Anyone have ideas as to why it would be stalling?

[second wind]

I have to share my recent experience as I include a couple different aspects but identical symptoms. '73 2.0 all stock with Pertronics 2....I think the smog idle device (afr?) is removed. So after many vapor lock issues moved fuel pump up front and problem disappeared. I drive maybe 3-4,000 miles a year...maybe 5,000. So car has worked perfect and routinely for last couple of years but a month ago started to do the low idle no start when warm routine. I discovered a broken wire on the temp sensor on top of the plenum (temp sensor 1 I believe) and repaired it. I also have a throttle body cleaning machine, BG Products, and did the cleanse as well. After I clean the throttle body I can hear the idle adjustment screw much clearer and usually have to turn the idel down. I think these cars like a really clean throttle body. Car ran like a jet and started perfect so I thought I was out of the woods. I accidently pulled the cold start injector plug out upon re-assembly and car would not start next day and I missed the recent SoCal ride. Anyway cars seems all cured now. Hope that offered something.
All the best to all,
gg