is a b18a1 ecu an obd1 because it says non obd on it the thing is i got it in my zc and its running to rich people tell me that a pr4 will do that and that i need a pm6 or pm7 is that just a chip what i want to do is run a obd1 and chip it with a p29 then turbo it and so what kind of ecu should i get for my zc and what harrnes do i need thankz

 

PR4 ECUs were OBD0 in 90-91 and OBD1 in 92-93 - why not leave it OBD0, get a PM6 ECU and chip it?