No luck again today...

Note: I have 5v from the MS to the crank sensor, and the signal and ground from the crank sensor going just to the MS.

First the idea I tried was running the opto-out to the vrin, then the vrout (not the inverse one) to the tsel. When cranking the lights seemed to flash off instead of on, and one led would stay on after trying to crank. I think (it was inversed) I should have ran it through the vrout-inv. This would be like one noise reduction step above corbin's idea.

Since that didn't work, I decided to just try corbin's idea and only go through the vr circuit.

Well I got a clean signal, and cranking rpm was steady, but when it start running it sounded AWFUL, as if timing was waay off. Since we have a wasted spark setup is there even a way to check ignition timing?

I set the hystersis adjustment to 0, and first tried corbin's recommended 8-1/2 turns (w/o the injector/ign fuses in place) and cranking rpm was pretty wild, between 100-300. Well I have the crank sensor powered on 5v and the signal not on the stock ecu's circuit, so I assume this would change things. I assume the lower voltage would mean a lower crossover point, I turned the adjustment down and anywhere between 7 and 3 total clockwise turns it would have a dead steady crank rpm. It just seems ign timing is way off...

This is so hard to try to figure out without an expensive o-scope.

I guess the next thing I will try is changing everything back, then sending the signal from the opto-out to the vrin then vrout-inv to tsel and maybe the timing will be right then.

Let me know if you experienced the same thing gilee.

...MegaSquirtnSuck

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician