I have an '81 280zxt. I put in the pre-build MS3, v357 about a year ago. All stock - only mod is an 82/83 Turbo dizzy to replace the '81 dizzy on-flyweel CAS.
I drove the car every other week or so as I started to do body work. Suddenly, as I drove back into the driveway a few months ago - the car died. I've been debbuging ever since. I also sent the MS3 back to DIYAT and had Matt take a look. He said it appears to be operating fine.
I've re-checked all of my connections. I re-soldered some. No luck. I am getting RPM/trigger signal. Everything appears to be working as "it was" when i was driving the car. The only thing I see that is suspicious is the spark. When I remove a plug, hold it against a ground and have someone crank the car - there ONE great spark - then only a very, very week spark that is barley detectible. I do get enough spark to trigger a timing light (yes - I'm still at TDC). I replaced the coil just for grins - but no change.
The car fires - attempts to start - every so often, but that's it. I believe I have a spark problem. Although Matt says he did not see any problem when he tested the unit, I am suspicious of the BIP373 coil driver.
Any suggestions?