[Got Vtec?]

Alright so after reading through some old threads about this I was starting to get confused. So this thread is me trying to get this straight. I have a 91 CRX that was converted to MPFI, and I am using a jumper harness for OBD0-OBD1 with a P28 ECU. From what I have read, this is what I understand.

OBD0 - Need a Resistor Box
OBD1 - No Resistor Box

So in my situation does this mean I don't need the resister box?

 

[CRAZYCIVIC]

I dont think you need one unless your running bigger injectors

 

[Got Vtec?]

Bump

 

[go fast d-series]

don't need r-box unless u use the obd 1 injectors,
cause the obd 0 injector only works on 5.5 volts, and without the r-box you will fried them.

 

[siregcivic]

if you have obd0 injectors you need the resistor box.. im sure even tho your car is converted to obd1 you still have the resistor box.. my friend still does

 

[Got Vtec?]

Yeah I have the obd1 z6 injectors with the resistor box

 

[CRAZYCIVIC]

thats odd...i did my z6 swap into my 91 and it ran fine with no res box...im confused now

 

[siregcivic]

thats odd...i did my z6 swap into my 91 and it ran fine with no res box...im confused now

if you use obd1 injectors you dont need a resister box...

 

[russianswty]

wow some people are making it complicated.
obd 0 cars came with resister box's, meaning you can only use the peak &hold injectors, which are 5.5v or something.
But newer vehicles like
obd 1 did not use the resister box with the other injectors.

Just because your converting does mean you have to get rid of the box as long as you use your stock injectors even if your converting to obd 1.

 

[überTUNED]

also the 1990-1996 accord/prelude injectors for the F22 motors use a resistor box...

 

[Got Vtec?]

So if I am going to run DSM 450s can I just leave in the resistor box and everything will be fine?

 

[Green 91]

So if I am going to run DSM 450s can I just leave in the resistor box and everything will be fine?

yes