I've been doing research for a while now, I read that if I use OBD1 injectors i do not need the resistor box, What about using an OBD1 Intake Manifold? Can it be done? I have 2 OBD1 IM and 1 OBD2 IM if that's any easier... I assume I will have to get an auto pre-obd ecu for mpfi... I'm not afraid of doing the rewiring of my harness... Will obd0 injector connectors connect to OBD1 injectors?

I have a 91 4door dx auto

 

I'm using a D16Z6 (OBD1) manifold. In order to use an OBD 1 manifold you have to use the OBD1 fuel rail, as the OBD0 one doesn't line up right. After my horrific MPFI experience I recommend just sending your harness in to Rywire.com honestly. You're only left to solder a few wires, making things a lot cleaner and easier. I believe you are correct on the injector as well, but I"m not 100% sure, so let someone else verify that.

 

obd0 injectors = resistor box. obd1= no box. im's depend on the famaly of motor. only D will fit D motors B to B etc.. so if u got a d15b2 and got a D IM all green lights for u. u can stay obd0 or go obd1. obd0 mpfi auto is PS9 ecu from 90-91 civic 4dr EX. staying obd0 is the easyest. no on the injector plugs. obd0 is the all too famure milk-white-faded-to-yellow plugs. obd1 is gray plugs. they have diffrent keys in them and one cant be pluged into the other.

EDIT why the expletive am i allways beaten

 

so i will need, ODB1 im (i have), ODB1 fuel rail (i have) ODB1 injector plugs (i need to get)... or perhaps I'll go visit some junk yards and pull some OBD0 stuff...

 

yes or you could use obd0 injectors and wire in a resistor box if you have the obd0 injector plugs already i would say just get the obd1 injector plugs with a good length of wire on them

 

OBD1 injectors can be used with the OBD0 ecu correct? this is probably the way I will go because around where I live, it's hard to find resistor boxes or maybe i'm lookin in the wrong junk yards... I had a d16y8 head laying around I was thinking I should put that head on and just run it without vtec, it's a much better flowing head plus I don't think I would mess it up if I don't run vtec right?