MicroSquirt.com read only forum (Jan.15,2018)

I have done some testing yesterday, I bought a timing light, a dumb unit with no advance.
So at first the no pluse problem came back, so I switched MSQ to a 1.01 version, I finally had inj pulses going.
I tried different settings, inverting the coil output, setting dwell in many ways, the dwell gauge was dancing all over the place, but it may be the gauge, and I had constant spark with 25 ms dwell and 25 spark duration, but next cranking event it could start late, be erratic or no spark at all, then come back for 10-15 cycles, I had some with dwell and dur set a 8 even with 3. I moved the jumper to the regular coil drive position and tried this way without much more success, inverted or not.
Manually, when a ground is applied to the ign output, it will not fire the coil, but when the gound is released it throws a bright blue spark, if I scratch my ground connection, it will throw a hell of a bunch of bright blue sparks real fast.
On the logic level, as soon as I power up uS I have a ground even with engine off, so if I disconnect the ign channel i get a spark or if I shut down the unit I get a spark too. I see the need for a scope, but I have none for now.
I have a multimeter with frequency and limited functionality.
I guess I need a clean square wave with a long ground followed by an open circuit.
I will do some more testing with datalogs today (with a cold beer to keep this thing in a relaxed fashion)
Thanks for the help Grippo, much appreciated.

Breaking news !!
I got constant spark , the timing light seem to be in cause not picking up the spark all the time, I kept off the logic level and used the going low I think, the one that is not grounding the CDI when the engine is stopped, I set the dwell at 25.5 and the spark duration at 2.0and get very nice and repeatable sparks.
Now I'm fighting the timing, I set it to calculated I'm having a hard time to see my timing marks, more reading for me I guess

I got the bike to run , but I would need some advice since the settings are way off from what I would expect them to be.
I'm getting very confused with the relation of the ignition settings and I don't think it's right

Here's the setup, 90° V-twin, firing order, Front-->270°-->rear-->450°front and so on.
Cylinder #1 is the rear one so I expect to fire the rear coil first
Rear-->90"-->front-->270°-->rear-->90°-->front--->270°rear
My offset angle is set to 120°, the odd angle of the rear cyl (#2 ign channel) to 181° (I don't get the 1 degree to align both timing marks, maybe computer delay), teeth number 12, missing teeth 3, skip teeth 6, delay teeth 0
I had the skip teeth set to 12, but I realized that I needed 2 tach, I would expect the second channel angle to be 90° (90° before the 180° tach=90°), but it need to be set at 181° to fire the front coil at the same point as the rear one.

If the wheel timing matches your timing light at several different rpms and the rpm matches your tach reading, then your setup should be ok. The only thing that bothers me is your 25 ms coil duration - that seems excessive and you might burn up your coils at high rpms.

Thanks for the advice, as soon as I can get some stable idle, I will teke off some dwell until misfire and back up.
When they are grounded engine off for a long period, they don't heat up at all so I guess the converter is triggering the coils when the ground collapse. I'm using the coil drivers at a logic level, but it seem to work, Thanks for the support Grippo.
Will post the final result