can anyone answer this?

 

I believe it is obd2. I think this because of the obd2 p13 which I believe only came for the 96 lude. and you can get a jdm p13 obd2 ecu.

check on ebay for the jdm p13 obd2 ecu. I would help you out but can't go on ebay at work.

 

well, on ebay some say 92-95, some say 92-96... conflicting answers. when did they switch to OBD2?

 

96 preludes are obd2.
92-95 are obd1.

I don't think there is such a thing as a jdm obd2 p13, could be wrong though.

 

I know that was the case for USDM cars, but is JDM different? An engine importer told me that 96 is OBD1 in Japan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Propulsion &raquo;</TD></TR><TR><TD CLASS="quote">I know that was the case for USDM cars, but is JDM different? An engine importer told me that 96 is OBD1 in Japan </TD></TR></TABLE>

I've heard the same... I don't know all the details though. I've heard that that it has the obd2 connector, but still runs obd1 software?

where is mgags... I bet he would know.

 

96 jdm h22a is obd2.

 

does the 96 use a resistor box? 345cc injectors?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Saosinx &raquo;</TD></TR><TR><TD CLASS="quote">96 jdm h22a is obd2.</TD></TR></TABLE>

correct, its not hard to convert to obd1... i did it, but i had a obd1 lude

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93h22a1vtec &raquo;</TD></TR><TR><TD CLASS="quote">correct, its not hard to convert to obd1... i did it, but i had a obd1 lude</TD></TR></TABLE>

it will be a lot easier if you're planning on putting the JDM motor into a 92-95

 

92-95 is OBDI
96 - present is OBDII

 

If my car is also a 96, can I use the USDM 96 ecu?

or is there that problem w/ the crank position sensor?

 

if your car is a 96, why would you have a problem with a 96 ecu?

dont mean for that to come off prickish.....

 

you will be fine, im pretty sure those motors are the exact same (other than internals)

 

what I mean is, I've heard that the USDM ecu looks for the crank position sensor which is at a different location on the JDM motor thus generating an CEL.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Propulsion &raquo;</TD></TR><TR><TD CLASS="quote">what I mean is, I've heard that the USDM ecu looks for the crank position sensor which is at a different location on the JDM motor thus generating an CEL. </TD></TR></TABLE>

ahhh, ok..yea. It's hard to think of a 4th gen like a 5th gen with a J swap.

but you can still run the usdm ecu if you make pretty much everything on the outside of the motor OBDII ie: alt, PS, AC, distributer, oil pump...thats the way it is on a 5th gen atleast. Unless you wanna do some ghetto *** wiring.

 

Oops didn't mention that I have a 96 civic and trying to put a 96 JDM h22a in it.

So both the motor and ecu are obd2a.

I need to get it ref'ed, and someone said that you can't use the USDM computer w/ the JDM motor w/o generating a crank positioning sensor Code.

 

switch over to OBD 1 sooooo much better

 

You obviously don't know about CA laws

 

I don't know if all 96 usdm ludes are obd2 or not but i know for sure that not all 96 jdm ludes are obd2. I actually just met a guy that has an obd1 96 rhd jdm lude.

 

Its all in the wiring harness... If your car is OBD2 the wires for the crank sensor go down to the crank so using an OBD2 ecu would still work just fine would it not?

On an OBD2 H22 engine the crank sensor is attached to the oil pump down by the crank... If your ECU is OBD2 just check to make sure that the sensor is attached to the oil pump on the JDM engine, if not than its in the distributor, hense an OBD1 engine.

 

heres what you need to do:

Read This

do all the necessary mods to hook everything up on the h22, check the hybrid forum, they have a huge thread on how to do that, the crank pos. sensor will be addressed there

then get your hands on a 96 prelude ecu, a p13 (h22a) would be nice, but a p14(h23) would work well enough, i got my 96 lude w/obd1 h22a to pass with a p14...
note: it is crucial that the ecu is 96 only, the 97+ will not work

the crank pos sensor issues that you are talking about come in when you use an obd2 engine harness on an obd1 engine, obd2 motors have the ckp at the oil pump, and the connector is over there, obd1 has it in the distributor, so you have to make a little jumper harness and pin in the 4 wires for the sensor, i had to do this, you will not

 

actually, all JDM h22a's OBD1 and OBD2 have the crank sensor in the Distributor. So I'll have to wire that up to feed the USDM OBD2 ecu w/ the crank signal.

 

Yeah I was wondering that when I was typing all of it...

 

wow...this is why I didn't swap my h22a into my 1996 lude S...I'll save the h22a swapping it into my integra in the future....for now, f22a1 boost here I come!