Technical Weak injector pulse? No start troubleshooting

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Technical Weak injector pulse? No start troubleshooting

radeznc

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Joined
Dec 5, 2022
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Location
Raleigh, NC
Hey Folks,
1982 124 Spider 2000 barn find. I'm trying to get it to start.
My noid light blinks, but I have to turn the lights off at night to see it happen.

I've verified fuel pressure.
I can get it to fire on starter fluid, spark is there.
I've verified the injector side of the dual relay. (oddly it measured 25v???)
I've traced the brown and white wire, there's not a fuse on it, PO must have removed it.
I've verified 0 ohms on the ecu grounds.
I've cleaned the 2 grounds connected to the intake manifold and both ends of the ground from the valve cover to the body.
I've checked the TPS sends the signal it's closed.
I've tried a 200 ohm resistor in the temp sensor wire.
I've checked resistance on the air flow sensor.
My cold start valve wire turns on for 8 seconds and off, but I cannot hear it click. (can it start without this?)
I get a flickering test light from pin 1 when the distributor is turning.
My noid light will blink faintly when starting.
I just replaced all 4 injectors.
I've pulled the alternator and verified 0 ohms with test leads one way and infinity the opposite way.
I opened up the ECU and verified the two power transistors. They both seem to test ok.


I'm pretty sure the cold start valve needs to be replaced, I've been waiting to do that until I get the injector pulse sorted out.
I'm guessing the weak pulse is maybe a ground issue. I'm not sure where else to check/clean a ground.

What am I missing?
Anyone have an extra ECU I could pay for shipping to try swapping with mine to see if it's my ECU? I'm in Raleigh, NC 27606

Thanks for your time!
 
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