I may have answered my own question. I did some poking around and found several negative threads about the MSD coils. So unless I missed something during installation, its back to the originals.
Could also be ignition module - try changing back to your old ignition coil if this cures it then its the msd coil if it does'nt then I'd go for the module at fault
I was going to wait till tomorrow morning to put the old ones back, but a storm is blowing through and its cooled off a lot. So, I put the old ones back in and she fired right up and stayed running. So, the MSD's are going back.
The MSD's draw more current on the primary side, so they are probably just overloading your stock system that supplies them. You won't gain anything with them any way, so you are money ahead. Larry
The only good that MSD stuff is for is to look pretty on a shelf.
If you do get new coils, keep the better (i.e. "working" one) of your old coils as a back-up. That way if in the future say you've accumulated some miles, you're driving, and have similar issues with a coil you can at least swap it out to get you by.
Try the MSD Streetfire coil, it is a OEM style replacement. One has worked fine on our 2.8L V-6 with a AC module and AC distributor coil for the last 3 years. Yep, it also looks good. Cost about $30.
