I thought that the '86-'89 ECM was a MAF ECM only? Was it used for MAP applications too? GM used the '165 MAF until '89 and then switched to MAP in '90 right? Jim Brady '87 Monte SS 383 TPI 6 speed > Jim and Sharon Brady wrote: > > > > regarding the choice between MAF(ECM #'165) and MAP(ECM #'730). > > How about MAP '165? > >