Stock ECU works and M2 doesn't?-HELP-
 

stock ECU works and M2 doesn't?
I recentlly had problems with my car. (here's the previous post: https://www.rx7club.com/forum/showth...&threadid=96564 )

I decided to try the original ECU and see if my car would start. It started albeit with a very rough idle. Why wouldn't it crank over with the M2 ECU and will with the Stock ECU???

Any ideas???