92 chevy lumina 3.1 crank but no start

[tazpiggy2]

This car started to stall sputter. I replaced the ignition module and it worked for while then nothing at all but still cranks. I checked all of the fuses and every thing was working. What i have found and i think this was the whole problem.
The wiring harness that goes from the ignition module to the crank sensor, the wires were twisted and frayed and most likely grounding out on the frame and making the computer to shut down. So far after replacing the wires it started right up. Have not had a chance to take it for a test run to re learn the computer because my brake line busted.

Hope this is of any help.

[jeffcoslacker]

Good catch. It's common on the older ones for the crank sensor wiring to come out of the hold-downs and get fouled against something it can ground out on.

If you didn't replace the sensor you might want to, they seem to have a similar service life as the module. Then again it may just be the case that when you replaced that, you were pulling on the wiring to the crank sensor as you unplugged it, and temporarily relieved the grounding problem.