have a 91 civic with a blown motor(dropped a rod) engine code d15b2 now i swapped a d15b1 in and still wont run.. now the junk yard said it wasnt compadible but i couldnt see what the differince is..but i have tryed bothe ecus and still not starting.. have spark and fuel.. f

 

d15b1 is hf? correct? Anyhow the b1 is EFI and the d15b2 is carborated, so you might have to do a dpfi to mpfi, correct me if im wrong