well i have a z6 manifold sitting here with all the injectors and sensors already on it. Is there any parts i need to do different when doing my mpfi swap? and can i use the current dizzy or do i need to get the si dizzy or can i use a z6 dizzy?

 

bump any help?

 

with the Z6 OBD1 injectors, you won't need the injector resistor box - you need Si or HF distributor and Si ECU - OBD1 Z6 distributor won't work with OBD0 ECU

 

you can do a regular mpfi swap. si dizzy, modify your dx harness to mpfi swap, injector resistor. you can use the z6 manifold but like ^he said. theyre OBD1. just swap out the injectors with OBD0.

 

You can use the obd1 injectors, but you would have to cut the obd0 plugs off and solder the obd1 plugs on, and then cut the injector resistor box plug off and solder all the wires together. Easier to just use your obd0 injectors lol

 

ok well i guess i should be a little more specific i am going from dpfi to the mpfi. So what you are saying is all i need is the injector clips to do so. How would i go about wiring this since i dont need the resistor box all the write ups use the resistor box. Also this is just a precursor to me actually swapping in the z6 itself since i dont have a z6 harness at the moment i figured i might as well do the mpfi swap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thevtecnician &raquo;</TD></TR><TR><TD CLASS="quote">You can use the obd1 injectors, but you would have to cut the obd0 plugs off and solder the obd1 plugs on</TD></TR></TABLE>i have done dozens of these swaps and have always used the OBD0 injector clips with the OBD1 injectors - don't know how this idea got started but it keeps getting repeated and simply isn't true

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shadow102 &raquo;</TD></TR><TR><TD CLASS="quote">ok well i guess i should be a little more specific i am going from dpfi to the mpfi. So what you are saying is all i need is the injector clips to do so. How would i go about wiring this since i dont need the resistor box all the write ups use the resistor box. Also this is just a precursor to me actually swapping in the z6 itself since i dont have a z6 harness at the moment i figured i might as well do the mpfi swap</TD></TR></TABLE>
I'm currently doing this same swap cuz I dropped a D16A6 into a DX hatch last week and wanted to keep the MPFI system...

Contrary to popular belief, you can keep your DX ECU when doing this swap.

The March 2003 issue of Honda Tuning has an article in it showing step by step what you need to do for the swap.

Basically, you keep your DPFI harness, extend the IACV wires, move 2 wires on the harness (C1 to B10, C2 to B12), add 2 wires to the distributor plug (blue/green, blue/yel) and feed them into the ECU harness in spots C1 and C2 respectively. Swap the 2 outside wires on the TPS plug.

Next is the injector part - (keep in mind they use the resistor box):
Run brown wire from the resistor box to injector 1 (replacing yellow wire that was on the secondary injector).
Run light blu wire from " to injector 3 (relplacing red wire that was on primary injector).
Run red wire from injector 2 to pin A3 at the ECU. Run yellow wire from injector 4 to pin A7 at the ECU. A3 and A7 had wires in them but they are no longer used, so just replace them with the new wires you just ran.

Power the resistor box via the large yellow/black wire on the left-hand shock tower harness.

Finally, wire up the power feeds for each injector from the resister box (red/black wires).
---------
Now, if you have high-impedance injectors you should be able to just run the power from that yellow/black wire directly to each injector instead of using the resistor box.


Modified by kalm_traveler at 4:55 PM 12/5/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kalm_traveler &raquo;</TD></TR><TR><TD CLASS="quote">
Contrary to popular belief, you can keep your ECU (and dizzy) when doing this swap.

</TD></TR></TABLE>

You sure about that? The stock ECU is designed to run two fuel injectors up the intake plenum and not 4 injectors dedicated to each cylinder. Also, the DX dizzy doesn't have the Cylinder Position Sensor (I believe that is what it is called) integrated into it like the Si/EX dizzy yet you specify to wire up the extra plug. If you reuse your original distributor, where does the plug come from? And where does it go?

 

http://www.angelfire.com/d20/h....html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 24TEN &raquo;</TD></TR><TR><TD CLASS="quote">

You sure about that? The stock ECU is designed to run two fuel injectors up the intake plenum and not 4 injectors dedicated to each cylinder. Also, the DX dizzy doesn't have the Cylinder Position Sensor (I believe that is what it is called) integrated into it like the Si/EX dizzy yet you specify to wire up the extra plug. If you reuse your original distributor, where does the plug come from? And where does it go?</TD></TR></TABLE>
You're absolutely right!

sorry that was a mistake, I'll go fix my old post. If you'd like I can scan the 4 page writeup straight from the Honda Tuning for you as far as the wiring changes (to continue using the DX ECU).

From the pin swaps, etc that are done it would seem to me that the DX and SI ECU's have pretty much the same hardware and program, but that depending on what inputs/outputs the harness gives it lets it know if it's running a 2-injector or 4-injector system.

I'm splicing my harnesses as we speak, so I'll let you know tomorrow how it works out.