Okay guys I know all the parts I need to do this
OBD-1 ecu harness
OBD-1 Dizzy
OBD-1 ECU
4 wire O2 Sensor
OBD-1 Injectors

But here is my question. I have a b16 swapped into an LX that I converted to mpfi and ran the vtec wires, extra 02 and knock sensor. The conversion harness has wires for vtec, 4 wire 02 etc...What do I do with the wires I ran from the stock ECU to the engine, since I am using new ones from the obd1 harness?

Thanks!

 

I'm a little confused. Are you using an OBD1 wiring harness or OBD0 wiring harness?

 

If you're using a modified OBD0 harness, then you should just use an OBD0 - OBD1 conversion harness, and use the VTEC/O2 wires coming off that and hook them up to your engine components. If your OBD0 harness was modified to be able to run VTEC/O2 sensors to an OBD0 VTEC ecu, then all you need to do is solder those wires to the VTEC/O2 wires coming off the conversion harness.

If you're using an OBD1 harness, then you shouldn't be having a wiring issue. Everything should just plug right up..

 

I am using the stock obd0 wiring harness and doing an obd1 conversion

 

OK, if that's the case, then just buy a jumper harness. It will come with the necessary wire leads to hook up to your VTEC lines and O2 sensor.

Everything else should stay hooked up to your engine. The only part of the wiring that changes is that the jumper harness goes between your OBD0 plug and your new OBD1 ECU.

Does this answer your question?

 

You do NOT need to do anything with the injectors, your obd0 injectors will be just fine. There is no point in changing them.

 

who said anything about injectors?

 

the OP said he had obd1 injectors. he could use them, but their's really no reason to switch em out and remove the res. box unless his stock peak/hold's are malfunctioning somehow.

 

Oh yeah. that would mean cutting wires, and all sorts of fun stuff. My understanding is that low impedance injectors are more responsive for higher flow precision. So going with the OBD 1 injectors would technically be an expensive downgrade. Don't do it. Keep the OBD 0 injectors. These guys are correct.

Just curious, why bother with the conversion? Are you planning to run some kind of piggy back ecu? Boost?

 

as for the injectors...i would do the new injector swap....and this will help cuz, old injectors are well....OLD.....even if the worked better BACK THEN, they don't work better now

and if you use old D-series injectors on B-series motor...they might make your motor run to lean, as most b-series motors need a 235cc injector or bigger to run correctly. And quite a few D-series use 180cc injectors....so its a BIG difference.

plus doing the injector wire swap is easy, quick, and save you time finding replacement obd0 injectors. and using the new injectors will let you use the injector plug(found in 92+ honda's) this is a great little plug that will kill the injectors when taking out. So thus its a cheap way to make sure no one can steal your car.

also, you can rewire your distributor plugs and injectors at the Harness. So it will make swapping another obd1 motor easy, instead of finding a new distributor.

The rewiring is easy, you just need wire snips,electrical tape, a wiring diagram, and a cold drink.(I find pepsi to work best)

Trust someone who has already done this, with an OBD2 motor. Just taking your time and doing it the right way will save you hours of second guessing yourself, and or frying your engine harness. There are more then enough write up on this. and if you find yourself stuck, don't hesitate to come here and ask a question or two.

Good Luck. And DON'T forget that cold drink........

 

virtually all d and b series injectors are 240cc. only the d16y7 has smaller 190cc injectors.

 

d15a3 - 180cc
d15b6 - 180cc
d16y7 - 180cc
d15b8 - 180cc

those are among the most mass made honda motors there are in the US so mixing up injectors is easy

Don't say all injectors are the same and then

say the d16y7 is different. It makes your sentence confusing

and plus, use of OLD parts on a NEWER motor, is just stupid and asking for trouble

 

d15a3 is not usdm, nor common within the US, so why include it. the b6 has 180cc injectors from 88-89, but 235's from 90-91. b8 appears to be 180's, and this is honestly the first time i've heard that. when i said virtually all, that means most but not all, by the way. look up the definition of words you don't understand, it makes it easier on everyone. What i should have clarified is that almost all obd1 and obd2 injectors for d and b-series are 240cc saturated. 2 exceptions to that rule being a 92-96 prelude which came with peak and hold 345cc injectors, and 97+ preludes with saturated 280cc injectors.

 

That is just plain stupid. If your engine you are replacing ...like mine was...was running in
PERFECT condition, but you wanted to swap to a B or newer setup....your reasoning for NOT using the existing injectors is nothing but a waste of money and time.

 

if the injectors wok fine just go with them =]
wats the worst that can happen????
nothing!!!