obd1 conversion problem

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Old Oct 12, 2009 | 07:49 AM
  #1  
zenon8890's Avatar
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From: AmmanJordan, Jordan
Default obd1 conversion problem

i have 88 crx, i just swapped a d15b vtec engine with the d15b obd1 harness, i have H22 injectors so i wanna keep using them, i want to keep that thing that the injectors has i dont know the name of it to keep those injectors, i dont wanna go to obd1 injectors.

please can u show me a diagram or a way to re-wire the obd1 injector harness to that thing!!
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Old Oct 12, 2009 | 07:57 AM
  #2  
OneBadTurboCRV's Avatar
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From: IN Your Mind
Default Re: obd1 conversion problem

Huh???

The box is called a Resistor Box... Look in the FAQ there are pleanty of write-ups on how to do this...
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Old Oct 12, 2009 | 08:04 AM
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4drEF's Avatar
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From: Granada Hills, Ca, USA
Default Re: obd1 conversion problem

This seems like the LEAST of your worries.
Do you have this motor in your car? Because that D15b vtec harness should be giving you major headaches as you try to plug it in to your cabin-side harness plugs.
Typical swap uses the STOCK engine harness that came with your car and then you add wires and plugs as needed.
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Old Oct 13, 2009 | 03:47 AM
  #4  
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From: AmmanJordan, Jordan
Default Re: obd1 conversion problem

my stock harness is not working good, and its a racing car not street one, i dont need cabin harness
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Old Oct 13, 2009 | 10:22 AM
  #5  
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From: ohio
Default Re: obd1 conversion problem

yes you do need the cabin part because it's what connects to the ecu. also if you're using a stock ecu to run the d15b then you will not be able to use those injectors. they are 330cc in size and much larger than what the stock (i assume you have a p28?) was programmed to control.
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Old Oct 13, 2009 | 10:33 AM
  #6  
sh!ft's Avatar
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From: Houston, TX, USA
Default Re: obd1 conversion problem

if their h22a4's they their flow rate is 345cc
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Old Oct 13, 2009 | 12:49 PM
  #7  
dephtone's Avatar
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From: NE Ohio, USA
Default Re: obd1 conversion problem

1992-'96 Prelude VTEC Peak and Hold 345cc
1997-up Prelude VTEC H22 Saturated 280c

Depends on what year prelude it came out of and will also depend on if you need to run a resistor box or not.
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Old Oct 13, 2009 | 03:49 PM
  #8  
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From: AmmanJordan, Jordan
Default Re: obd1 conversion problem

i had those on stock harness with pm6 ecu, i'm gonna chip the po8 ecu to run those injectors dont worry, i just wanna know the way to keep the resistor box and these injectors and use them, i should cut the wires and connect them to the injectors and there is 4 black and red wires and one yellow and black, where does it go?!
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Old Oct 13, 2009 | 04:00 PM
  #9  
D16SiHatch's Avatar
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From: ohio
Default Re: obd1 conversion problem

copied from emshhh's how to turbocharge your honda thread

On obd1 Honda's, there is a "dead end" clip on the wiring harness in the right corner of the engine bay. (obd2 has this clip under the intake manifold). This clip has the electrical power running through it that goes to the injectors. It is right next to the clutch master cylinder.



When you find the clip, pop off the Protecting cover so it exposes the inside.

Using a multimeter, check for conductivity between each clip and the end's of the "dead-end" connector. The idea is to find which wires actually are routed to the injector clips, so seeing if electricity can flow, you can guess-and-check and find out.
There are eight different wires going into the "dead-end" connector, all of which you must check to see if they are the winners! According to h-t, it could be random placed, so do not assume and follow my example. CHECK FOR YOURSELF TO MAKE SURE!


The red dots are showing which ones came out conductive for me. AGAIN, CHECK FOR YOURSELF TO MAKE SURE!

Once you found out which ones are conductive, move down 2-4 inches and cut the wire. This break in to wire is where you will have your resistor tie into the system. Strip both sides of the new striped wires.

If you take a look at your resistor box, there should be 5 wires coming out of it. Four of them should be common color and one of them should be a different color. Strip all the ends if they are not already.



Next, Take the Single different color wire from the resistor box and solder it to all Four of the wires on the "dead-end" side. See diagram for better explaintion.



Connect Each one of the Four common color wires from the resistor box to one of the four yellow/black wires on the Injector side of the cut. Solder each wire seperately, no order is nessecary.



Here is a Diagram I made for better explanation



Wrap all the exposed wires up with electrical tape and mount the resistor box in the corner. here is the finished product

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