Need specific how to links on wiring for OBDI engine in OBDII

just to let you know this is the scenario:
car:99 Prelude SH
engine: 95 JDM H22A automatic but using the OBDII wiring harness
the engine has been installed but now left is the wiring which is our problem....I went to quite a few sites but none really went in depth and it was hard to even find info for H series engines and on top of that I have yet to find a link for a h22a into a prelude most are into eg/ek/dc.....hat have you..and spare me the BS about getting an OBDI engine in the first place....I know dumb but whats done has been done and we are now trying to work with what we got...so please I would appreciate any info at all...THANKS!

also added on t3/t4 turbo(will run around 6) which everything was already done/installed onto the prior engine but now instead installed on the OBD1 engine.....

PLEASE HELP ASAP!!



Modified by gixxergrl at 5:35 AM 10/21/2003

 

Shouldn't be that bad.......plug in all the sensors that fit from the OBD2 harness on the OBD1 motor, only stuff left over will be emissions crap that you don't need anyways. The main difference between the OBD2 and OBD1 motors is that the crank angle sensor is in the distributor on the OBD1 motor, and down by the crank pulley on the OBD2 harness. If you rewire the CAS into the OBD1 distributor on your new motor you should be fine. Also, depending on what kind of injectors are in the OBD1 motor you might need a resistor box, as OBD1 injectors were peak and hold while OBD2 injectors were saturated.....
Brian

Edit: Just saw the SH and auto tranny part, not sure what to tell you there............

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Firedrake &raquo;</TD></TR><TR><TD CLASS="quote">Shouldn't be that bad.......plug in all the sensors that fit from the OBD2 harness on the OBD1 motor, only stuff left over will be emissions crap that you don't need anyways. The main difference between the OBD2 and OBD1 motors is that the crank angle sensor is in the distributor on the OBD1 motor, and down by the crank pulley on the OBD2 harness. If you rewire the CAS into the OBD1 distributor on your new motor you should be fine. Also, depending on what kind of injectors are in the OBD1 motor you might need a resistor box, as OBD1 injectors were peak and hold while OBD2 injectors were saturated.....
Brian</TD></TR></TABLE>

More specifically that's the CKP, Crankshaft Position sensor. Like Brian says it's not on the oil pump anymore it's in an OBDI distributor. All other plugs should work fine.

1) wire CKP sensor wiring to OBDI distriutor
2) Add injector resistor box for JDM H22a injectors
3) Get oBDII to OBDI conversion harness and run OBDI ecu


whoa...why is it an automatic?

 

Really picked an interesting swap, putting an automatic OBD1 engine into an SH prelude talk about a dollar well spent. This is not a common swap that is why you cannot find info on it, this is the first time I have heard of this being done. You are better off getting an OBD1 AUTO wire harness, It will be a major pain to wire for an OBD1 auto tranny from a OBD2/ATTS SH wire harness. You can follow the advice above but you still have to wire the auto tranny to an auto tranny controller and interface (plug in) it to the ECU, alot of work.

 

yeah as soon as I saw auto I got all confused....you defintely have to go with another wire harness if you want to save yourself from crying yourself to sleep all those nights the car isn;t running cause you have 100 wires to locate and re-wire. Maybe they're wanting to attach the SH tranny to the OBDI motor?

 

They would be unable to wire ATTS up for OBD1 as there is no OBD1 ecu that supports the feature.

 

yeah obviously I meant with non-functional ATTS.

 

I would actually recommend bolting up the SH tranny to the OBD1 block, instead of trying to get the Auto tranny to work. It would be alot easier.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gerhard_001 &raquo;</TD></TR><TR><TD CLASS="quote">I would actually recommend bolting up the SH tranny to the OBD1 block, instead of trying to get the Auto tranny to work. It would be alot easier.</TD></TR></TABLE>
or get a base or 4th gen tranny

 

everything is done except how to make the OBDI distributor work with the CKP...i need specific diagrams...wire colors etc and how to hook up the CKP to the OBDI distributor...

just to let you know the car isnt going to be converted into an Auto...it was going to remain 5 speed.

Thanks for the help and all the info guys I appreciate it!!

 

The car also has MSD ignition and blaster coil.....


***gixxergrl and I are the same person***
I wasnt able to log on for some reason so I created another ID.

 

I guess I can't resist A woman ina bathing suit.

On the OBDI Distributor the plug reads like this (assuming you have an OBDI ecu eventually)

ABCD
EFGH

Sens - Term - ECU - Wire Color
CKP ---- B ---- B15 - Blue/Green
CKP ---- F ---- -B16 - Blue/Yellow
TDC ---- C ---- B13 - Orange/Blue
TDC ---- G ---- B14 - White/Blue
CYP ---- D ---- B11 - Orange
CYP ---- H ---- B12 - White

So you have to take the OBDII Wire harness and find the CKP wires (should be a long wire that would reach to the oil pump maybe the colors are the same) Then you have to route them B/F on the distributor.

Best of luck.

 

It actually has an AEM ecu.

Anyhow the car is done, fixed and running all it needs is to get dyno tuned.

Thanks for all the knowledgeable advice and input I really appreciate it ya'll!!

"cant resist a woman in a bathing suit"
how do you know Im not really a dood...hahahaha Im j/k..

 

how come u swapped out the h22 to put another in it? did u blow it up?? i know that the difference in power is not that big of a deal. just curious

 

good question, well the previous engine was pretty much a fully built race ready engine...now a fully built race ready engine really has no business being in a heavy very show-like 99 Lude...so that engine will be put into an ultra light EG6 specifically VX...right now a roll cage is being built for the car..it will recieve Lexan windows, lightened doors and hatch, one piece fiber glass front end, one seat, fuel cell and so on..pretty much a trailor queen....anyhow the turbo(piping,intercooler,BOV,wastegate etc) that was on the previous engine is now on the new, well old actually OBDI engine(in the Lude) as a bigger turbo(and new kit) will be going on the original OBDII engine(in the EG)....therefore a very expensive engine will not be going to waste in a beast of a car...but rather actually being put to very good use in a shell basically on the strip.

 

Glad to hear the car is running.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gixxergrl &raquo;</TD></TR><TR><TD CLASS="quote">
"cant resist a woman in a bathing suit"
how do you know Im not really a dood...hahahaha Im j/k..
</TD></TR></TABLE>

yeah well anythings possible, I suppose I could impersonate Tila Nyguen to get some car advice on some boards...hmm gets idea...

 

haha thats a good idea as a matter of fact haha......sounds like something I would do....oh wait

 

you ride a gixxer too??

Prelude..... gixxer...... will you marry me?



Modified by Turbo Sam at 1:36 PM 10/30/2003