No Go
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No Go
here we go again! '92 Dakota. 5.2 auto. Won't start. Did this a while back. Would start, run for 5 minutes or an hour then quit. Replaced comp. IAC valve, crank sensor, hall effect sensor, O2 sensor. new computer seemed to do it. now I'm not getting voltage to coil. could it be the ignition switch? it turns over fine
Champion
Joined: Dec 2003
Posts: 4,119
Likes: 5
From: Sycamore, Illinois (displaced to Arkansas)
Like fwtc said, check the auto shutdown relay.
If that is getting power (it gets constant battery power on one pin, and when the key is on, power from the ignition switch on a differant pin), make sure there is good continuity between the output pin of the ASD and the positive pin of the coil. Than, disconnect the battery and test for good continuity between the ground pin of the coil and (I don't know what pin it is but...) the appropriate pin of the PCM.
If that's all good, remove the distributor cap and have a friend crank the engine and watch the rotor and make sure it rotates. If it doesn't, it could be a broke distrbutor shaft... or, like mine, a broken timing chain. (My particular situation, I wasn't getting voltage to the coil, and the timing chain was broke)
If that checks out, I would first make sure that there are no obvious wiring problems between the crank/cam sensors and the PCM. The engine won't run without a good input from these.
If that is getting power (it gets constant battery power on one pin, and when the key is on, power from the ignition switch on a differant pin), make sure there is good continuity between the output pin of the ASD and the positive pin of the coil. Than, disconnect the battery and test for good continuity between the ground pin of the coil and (I don't know what pin it is but...) the appropriate pin of the PCM.
If that's all good, remove the distributor cap and have a friend crank the engine and watch the rotor and make sure it rotates. If it doesn't, it could be a broke distrbutor shaft... or, like mine, a broken timing chain. (My particular situation, I wasn't getting voltage to the coil, and the timing chain was broke)
If that checks out, I would first make sure that there are no obvious wiring problems between the crank/cam sensors and the PCM. The engine won't run without a good input from these.
