NiKKa NiKKy

i got some questions,
i own a 97 civic coupe EX
it has a obd0 jdm b16a swap in it
the previous owner changed engine wiring harness from obd0 to obd2.
i am running the obd2a p2p ecu on it still.
only problems i have:
bad case of a cold start.
my vtec doesnt hit.
some wires are cut and spliced together and i think thats why it might not be working
a blue/red is cut and connected to a spliced yellow wire.
a white/red is cut and connected to a spliced black wire.
yea i know weird. vtec hit at 5200 rpm yesterday and today it isnt working?
could you help me? i tried reading your thread but since my motor is obd0 it might not be the same. well thanks.

v8killaz

convert it to obdI or 0

i dont think you can even run that motor on obdII because of the sesnors that are not being used

Katman

what a mess.
I responded to your PM.

Katman

thanks

Technically, yes using the Si ecu will and can power the JDM GSR engine...but..the Si ecu will not operate the secondary butterflies and you will lose out on about 10ft lbs of torque . If you don't care about that, use the Si ecu.....or.....go Single butterfly intake manifold ie. Skunk2 GSR intake manifold. Also, the Si ecu isn't quite programmed to run a 1.8L engine to its max potential. Thats when a GSR ecu would work best.

So, what I suggest is to run either an 00-01 GSR ecu (which will need an immobilizer replacement job - hit me up if you need this) or run an OBD2b-a jumper harness + 96-99 GSR ecu.

Now when it comes to the CKF, the only disadvantage of swapping an OBD2 B-series oil pump onto a JDM GSR engine is mostly time and $$$, whereas the wiring method is practically free.

choose wisely my young padowan.

bsmith100

Thanks again!

You have given me much to ponder. One of the main reasons I wanted to keep the original ECU from the Si was so when I went for the emissions test the ECU would display the same VIN as the rest of the car.

However, I don't want to lose the torque or lose any performance. So I will definitely get a GSR ECU for the car. When I have to go for the emissions test I will swap in the Si ECU for a week or two.

So then instead of getting an OBD2 GSR ECU, I will get a chipped OBD1 GSR ECU so I can get it tuned. I am pretty sure all I will need is a jumper harness to hook the OBD1 unit into the OBD2 harness.

I will go with the CKF bypass trick. I can use the money I saved from not having to buy a USDM oil pump to get that chipped OBD1 control unit. Does this sound like it would work?

NiKKa NiKKy

yea, i just learned that i think they were trying to do the ckf or cfk trick for the crank fluctuation sensor. i followed your detailed instructions on how to do it on ffsquad.com so yea. now that thats problem taken care of. my car still runs bad. bad cold starts in the morning? im throwin 5 CEL codes but one is for no cat. 10, 41, 54, 65, 6. CKF sensor is still on after the trick.

kyden

ek civics and integras don't display vin so you're fine on that part. so to stay obd2 compliant i would just use a 96-99 gsr ecu and be done with it.

bsmith100

That makes life much easier. Thanks!

Katman

hmm..
code 6 = ECT sensor
code 10 = IAT sensor
do you not have these 2 plugged in or something?

code 41 = primary 02 - heat oxygen sensor
got your primary 02 hooked up?

code 54 = CKF
perhaps you performed the wiring trick wrong

code 65 = secondary 02 sensor related (circuit malfunction)
Do you have your 2nd 02 hooked up? I'm betting not!

NiKKa NiKKy

where are these plugs located on the motor?

NiKKa NiKKy

lyzer227

i am doing a b20 vtec swap on a 94 integra but i have a obd2 dizzy. i wanted to convert the EWH so that the clips from the obd1 EWH match the obd2 dizzy WH. they have the same amount of wires and they go into the same spots but the colors do not match. i was wondering if i have to change any wires around or is it a simple cut and match the wires to the same spots that are on the dizzy WH.

lyzer227

u can also pm me

v8killaz

cut and match, though u cant color m,atch on all of the obdII dizzy's like said
mine was harder and the colors were way off

what dizzy is it
obdIIa or obdIIb

lyzer227

i really don't know if it is obd2a or obd2b. but it came off a b20 CRV how can u tell and will the dizzy even work?

v8killaz

yes the dizzy will work
how many wires are coing off the dizzy

lyzer227

there r 9 wires coming from the dizzy

Katman

Nikka, check your PM.

lyzer227,
It actually won't matter if the dizzy is OBD2a or OBD2b spec. OBD2a/b B-series VTEC dizzys are all the same regardless of A/B type.

Do all wire colors not match up or just a few?

Btw, you don't need to CUT any of the distributor wires to color match, simply DEPIN and repin. Cutting them is going to make things ugly.

You have the option of running a distributor jumper harness so you don't have perform any wiring mods, similar to this:
http://www.jhpusa.com/store/pc/catal...1dizplug_d.jpg

I believe I have one for your application if you're interested.

v8killaz

here
this is all the info ive gathered

katman, can u confirm all the obdII dizzy's are the same

Katman

They're not all the same if you're speaking across the board.

I specifically said "OBD2a/b B-series VTEC dizzys are all the same regardless of A/B type" in regards to lyzer227 specific swap/application.

v8killaz

cool

i got a 97 lx harnes d16y7 and im doing a 94 ls motor b18b1 into 98 ex chassis

dizzy im using is the ls stock one

the colors dont match up, the wires are all there 8 wires but they dont color match how should i go about to repin or match them up with the y7 harness

Katman

OBD2a engine harness w/OBD1 engine swap into 98 EX.

Is the 98 EX harness unavailable?

If the wire colors don't match up (for whatever reasons) just reference where each pin needs to go to their respective pin out BEFORE depinning or cutting anything so no confusion is created, then depin/repin one by one. The diagram you linked below pretty much provides this information if you disregard the wire color information.

I'm working on a dizzy plug diagram similiar to the one below with a tad more details, that should help in situations like this..where wire colors don't match up.

v8killaz

it gets me confused because the 3 diagrams dont match up, thats all

but what u said is what i already did and soldered the wires, ill be swapping the engine in today and hopefully get it cranking tommarow or so

ohh and about the harness the lx harness is what i bought the car came as a shell.
when i was trying to get the harness on i noticed some plugs were missing from the harness or just not on it that would go on the ls engine. ill get pics

Katman

I'm not sure if you're aware of this but Honda did some funky **** with the OBD2a/b civics and integras in regards to the dizzy plugs.
I have the break down listed on my diagram here:

lyzer227

Yeah thanks to both of u guys u really helped me out alot I will let you guys know if the swap starts LOL thanks