tyked15

ok so im lookin to swap in a d16z6 into my 90 ef si hatch an i looked everywhere on the web for info on what i need an couldnt come across any usefull infoso i need some help...help me out honda-tech

Slippery-Worm

Wiring harness with OBD-1 conversion, D16Z6 engine, P28 ECU... Thats pretty much it man. Use your same trans, mounts, linkage. It's pretty strait forward... anyone else is free to chime in

tyked15

what arhness the z6 harnessor my d16a6 harness that the only part im stuck on

macef9

some one help this guy! i dont know!!!!

24TEN

iTrader: (2)

The motor goes in the same way as your existing motor provided that you reuse your driver's side motor mount AND bracket. Reuse your existing harness, you may need to extend some wires or extend some vacuum lines (I say this specifically for the MAP sensor and purge solenoid, it's up to you if you want to keep those sensors mounted on the firewall as is OR if you want to utilize the ones that mount to the Z6 manifold/throttle body). You will definitely want to replace the fan switch plug (and extend if needed) to the newer style unless you want to tap the block to use the older style fan switch. Use a jumper harness for the ECU and it should have pig tails for VTEC related plugs. That should be about it.

julyef8

Don't forget to ad a 4 wire o2 sensor for vtec. I just put a z6 in my hf converted it to obd1 runs good!!! Good luck bro

mkriebs

Convenient... I am looking to swap a Vtec head on, and have a line on the head and ECM, no problems. But, do I need a harness to swap it over to OBD1? Seems like some contradiction in this thread, or I am severely misunderstanding everything.

Is it a matter of just wiring in the Vtec to the existing harness? That would be easy.

HondaPartsHero

Use your Si harness and add or adapt the following:

-OBD0-OBD1 ECU adapter harness with P28 ECU
-OBD0-OBD1 distributor adapter harness
-rewire fan switch from the back of the block to the thermostat housing
-use your obd0 injectors and keep the resistor box
-run wiring for 4 wire O2, VTEC solenoid, and VTEC pressure switch from each sensor the ECU connector
-use the mount on your engine's (D16A6) driver side on the Z6
-use the MAP sensor on your throttle body or the one on the firewall

96_civic_dx_b16

this is how to do it. dont worry it isnt as hard as it seams. rewiring a dx model is alot harder! good luck

tyked15

yea i wired my 4 four ef bomb for a a6 swap 2 years ago

tyked15

ok so my harnss with obd1 conversion harness wire up vtec an o2 wire an ill be set

uboostivtec

cakeee.. easy jus google image vtec wiring, and there will be diagrams for ya showing where to hook up vtec and o2... im pretty sure for obd0 and obd1

mkriebs

Noob question alert... can't run Vtec without being OBD1, can you?

uboostivtec

wow yea u can

uboostivtec

got pw0?

uboostivtec

and obd0 pr3 i think.. theres also ob1 pr3 tho

mkriebs

Ahh fml. Back to the research boards. I am SO new to honda stuff guys. What I come from, nothing is very interchangeable. Sorry for the stupid question.

uboostivtec

its cool man only way to learn is to ask

mkriebs

Whats PW0 and PR3? ECU codes?

uboostivtec

lol yup

mkriebs

Alright, I am not sure. Haven't bought the Vtec ECU yet. Just know its set back for me.

HondaPartsHero

You can And I did run the pr3 for a while. But for the best just get the p28. The pr3 and pwo will both look for a second 02 and knock sensor both of which the z6 doesnt have