Megasquirt on M20 - what doesn't work?

[Lugnuts]

Is there anything that doesn't work when you switch over to Megasquirt?

To put it differently, do you lose any function or capability that Motronic used to provide?

[nando]

Nothing really, ms2 should be your minimm setup. The mpg gauge wont work without a board from seattlecircuit.com but everything else will. M20s are simple.