coachk64

The research I've done on this problem indicates that, yes, the spark is initially generated in the distributor, by the crank sensor (PIP) sending a signal to the ICM. I've checked the crank sensor signal at the ICM and it is definitely there. I believe this indicates that the distributor is turning, but I'll still double-check that as soon as I get back to my truck (I don't have it home, but at my in-laws house as that was a much shorter tow than to my house).

PerryB

Crank signal doesnt tell you anything about the distributor. You'll have to pull the cap and look.

coachk64

The distributor is turning when the engine is cranked.

I think I'm going to just bite the bullet and replace the distributor. If that doesn't do it, then it has to be a defective new ICM.

After about 170K miles, a new distributor can't hurt anyway.

BLDTruth

My money is on the PIP too. Distributor replacement is really the best way to go with that problem, because you have to pull the distributor to replace it anyways. I spent at least $150 on new wires, plugs, coil, cap and rotor before I finally gave in and replaced it. Solved all my problems.

coachk64

OK, so now I've installed a brand new distributor, and still the exact same problem, no fire from the coil, and no crank signal from the Ignition Control Module to the coil.

Tomorrow I'm going to take back the new ICM and try a different one, as the troubleshooting steps from easyautodiagnostics.com still lead me right to that module.

Anybody have any ideas on anything I'm missing here?

BLDTruth

Damn. Make sure they give you the right ICM. There are a couple of different ones. On a 96 I am pretty sure it should be fender mounted and black (not gray), but you may want to research that a little yourself to be sure. The parts stores screw it up all the time - ask me how I know LOL.

coachk64

I sincerely hope it's that simple. Mine's fender mounted and black, and I'm pretty sure I remember that that's the one I got. I'll know more this evening.

coachk64

So the new Ignition Control Module made no difference, still no spark from the coil, no signal from the ICM to the coil, PIP signal still coming from the new distributor. I'm officially out of ideas.

Any and all suggestions gratefully accepted.

jtp1984

Ecm?

BLDTruth

Yeah might be time to pull the computer and see if there is any obvious corrosion. Maybe before that check to be certain all of your grounds are solid - and re-double check that the coil is actually getting power.