First, sorry for the long post but I want to be very complete in my description. I am working on a MSII install for a customer that has had a problem occur just recently. He has been successfully driving the car w/ MS for the past 6 months or so with no problem. A couple months ago the car quit on him and didn't restart for about 30 minutes. I found no faults and the car ran fine again for another month and did it again. The problem has now progressed to the point that it happens within 10 minutes of driving. The car resets rapidly on and off, you can hear and feal the main relay firing like a machine gun. I would guess that it is reseting 120 time or so a minute (~2 per sec). It only acts up under load for the most part too. Sometimes when it resets on the highway you can pull over on the shoulder and it will immediately free rev perfectly (not always, though). Then if you give it a 10 min rest (car turned off) on the shoulder it will drive again for a little while and repeat the above senario. In playing with the car I have noticed that with the alternator disconected completey I do not seem to have the problem, although I can only drive so far on the battery alone. I have changed the alternator already w/ a new Nissan OE unit for a 280ZX. I already plan on getting noise filters for the power wires going in to MS. Anyone have advice here? I just have this feeling that there is something more to my problem than a dirty power source.
Here is a little info on the car: '77 280Z, N/A 280ZX engine with only minor mods, '83ZX-T distributor
Info on the MS setup: DIY Autotune v3.57 board with MSII processor, MS relay board, VB921 firing coil directly, v2.6 software (have tried MS extra as well), board is jumped for optical input.
Thanks,
Kyle