If both of these are the c3 ecm where do I hook up my maf sensor on the 91 tbi? I just read the article on how to get started burning proms and noticed that the 85tpi and 88-92 ecm are the same. Wonder what us tbi'ers could do with this one.

 

The 85 ECM is not the same as the TBI ECM's.
C3 is just the family.

TPI
'85 1226870

TBI
'88 1228063
'89-92 1228746

 

Brent, It was wishfull thinking and kind of a joke at the same time. I never thought a maf sensor would hook up, but what if? Would be nice for the less radical mods.