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Crank Position Sensor had Failed 200 1990

Here's the latest, to various replies from ya'll. Ether sprayed into the small vacuum hose nipple consistently gets it to run smoothly for a few seconds till the ether is gone.
OBD DTMs 3 and 2 all check out fine, with lots of clicking and injector pulsing, and good test codes showing up.
The orange wire at the AMM shows power with the key on. Also the notorious 25a fuse and holder on fender well is flowing voltage no problem. Next???






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