well your in the same boat i was. Thats the only thing I havent changed on my ram. I finally said heck with it. Im buying a 12 valve cummins.. anyway If you want to try the computer, let me know what happens. Are you sure the wires are all ok?
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89' power ram w100 318 727 one of these days it will run.
Have you checked that Hall's effect gizmo in the dist?
If it just quits out of the blue, then starts and runs OK for a while, that could be the culprit
This one applies to the pre-TBI distributors, but may be of some assistance: