In reply to the comments on Megasquirt: With MS you can see all of the information that the computer sees plus the results of it's calculations. There is no window into L-junk, that is why you swap out AFM's, CTS's etc. Of course MS gets rid of the awful AFM and uses a MAP transducer and you can see it's output both in real time and in data logs. Same for coolant temp, air temp, injector on tine, ignition advance, dwell time,......... Troubleshooting is much easier. Even if the problem is not associated with the engine management, it allows you to eliminate it and focus on the other stuff.
76 Suzuki GT500
2011 Jaguar XKR
A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke