I am trying to find out the differences between the JDM ITR motor and the USDM ITR motor as far as emissions equipment is concerned.

Basically, I need to know what parts on the JDM motor are missing that the USDM ITR ECU will look for if used in conjunction.

So far, I have been told that the JDM motor is missing:

1- EGR Valve
2 - And a secondary O2 sensor must be hooked up (obviously) with the USDM ECU vs the JDM ECU
3 - What else?

Right now, I have to get my car up to spec for an OBD emissions test, but I am running a JDM ITR Motor and JDM ECU. I just want to know what parts I need besides the USDM ECU and EGR valve.

Also, if anybody foresees any huge problems I will encounter with this, please advise. I am beginning to think that this is a bigger project than I wanted to take on.

Thanks.

 

easy task.

Swap the intake/exhaust manifold for stock usdm itr.

And ecu.

Done.

 

That's it? What about this: https://honda-tech.com/zerothread?id=93624

What about the VTEC-pressure switch when I am running the USDM ECU?





Modified by Lynx at 10:08 AM 1/20/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00 FBP ItR &raquo;</TD></TR><TR><TD CLASS="quote">easy task.

Swap the intake/exhaust manifold for stock usdm itr.

And ecu.

Done.</TD></TR></TABLE>

It's not that simple.

You WILL need a USDM ITR oil pump,(according to Katman) and CKF sensor, to wire up CKF, if you plan on using a US type r ecu or you will throw a code. Here is the fix for the pressure switch problem:

Posted by VTECvillian: https://honda-tech.com/zerothread?id=634416

Note: Pinount locations are for OBD1.

"Kenji was the first person I knew that figured this out. The way to use the JDM VTEC solenoid with a USDM ECU or any ECU that looks for a VTEC pressure switch is to run the wire from D6 (VTEC Pressure Switch) and tap it into A4 (VTEC Solenoid). This connects the pressure switch and VTEC solenoid together so it won't throw a CEL. I've used this on 2 different cars and it works like a charm."

I think that's all. Post here if you find anything else out because this thread has a good searchable name Good Luck


Modified by 96BlackHB at 1:24 PM 1/20/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96BlackHB &raquo;</TD></TR><TR><TD CLASS="quote">

It's not that simple.

You WILL need a USDM ITR oil pump,(according to Katman) and CKF sensor, to wire up CKF, if you plan on using a US type r ecu or you will throw a code. Here is the fix for the pressure switch problem:

Posted by VTECvillian: https://honda-tech.com/zerothread?id=634416

Note: Pinount locations are for OBD1.

"Kenji was the first person I knew that figured this out. The way to use the JDM VTEC solenoid with a USDM ECU or any ECU that looks for a VTEC pressure switch is to run the wire from D6 (VTEC Pressure Switch) and tap it into A4 (VTEC Solenoid). This connects the pressure switch and VTEC solenoid together so it won't throw a CEL. I've used this on 2 different cars and it works like a charm."

I think that's all. Post here if you find anything else out because this thread has a good searchable name Good Luck


Modified by 96BlackHB at 1:24 PM 1/20/2004</TD></TR></TABLE>

Good stuff! I did some searching and came up with needing a CKF sensor and VTEC pressure switch. However, I was not aware of needing a new oil pump. I will be checking into that some more.

I would like to know if the wiring fix for the VTEC pressure switch is going to work for me though, since I will be running both O2 sensors. Hmm... I may PM VTECvillian or Kenji about this.

The more I am looking at it, do I really need the Intake manifold or exhaust manifold (header) at all? I am not dealing with a strict California visual inspection, so as long as there are no extra sensors on USDM intake manifold that aren't on the JDM intake manifold, I will not be needing this. It seems that you Californians do need USDM intake manifolds and exhaust manifolds though.

If anyone has any information to add, please do so. I would like this thread to be a good reference for those wishing to pass emissions legally with a JDM ITR swap.

 

Let me elaborate on the oil pump. The JDM oil pump has no provisions for the CKF sensor (which bolts to the oil pump). The USDM oil pump can accept the CKF sensor. There may be a part in the USDM oil pump that the CKF sensor reads also. All my research says you need to use the USDM oil pump, but if you can find a way to bolt the CKF to the JDM and have it function correctly, please post the info.

I don't think the pressure switch and 2nd O2 will affect each other. Basically you are wiring the Pressure Switch to the VTEC solenoid so you won't get a CEL.

Edit: By the way if you aren't getting a visual inspection don't bother changing the manifolds.


Modified by 96BlackHB at 12:08 PM 1/21/2004

 

Just hook up the 2nd O2 sensor so you can use the OBDII ECU.. Don't worry about getting VTEC to work, you just want it to pass emissions right? So who cares how much power it makes. As long as they don't care about VTEC CEL codes it should pass.

You may need to hook up the correct evap purge solonoid or you will get a code after 45 miles or so. If you can get away with it, just reset your ECU before you take it in.

FYI, you CAN bolt a USDM CKF/Oil Pump on a JDM block. But see if you can get away without the CKF swap first before spending time/money.

 

if you need help...let me know. i swaped in a JDM ITR into my GSR..

using a USDM ECU cause thats all I had at the time; have a JDM ECU right
now which would have made thigns "easier"

need to swap Crank fluc sensor; VTEC soleniod (for oil pressure switch) - easy; get from from a USDM engine; and obviously hook up second o2 sensor.
i didn't think the shop did anything diff with oil pump; not sure; will check into it

 

you are not supposed to be able to pass if yoru check engine light is on. thats for state ref though, dunno about regular smog.

 

Well, here's what happened:

After getting cussed out by one of the local service shops for wasting their time and money for bringing my car to them for emissions, I began a few posts to figure out how the hell to get my car to pass the OBD emissions test because there was no possible way to get the sniifer test done.

So, I ordered a USDM oil pump, ckf sensor, misc brackets, and a few other things on Thursday. I have access to a USDM ecu, so that was going to be swapped in temporarily. I was planning on picking the parts up on Friday and spending the weekend installing everything. Then I was going to get my emissions test done Monday or Tuesday as the deadline was Wednesday.

So, after the parts were not delivered to my brother's shop on Friday, I call Saturday morning to see what is going on. The parts manager never did anything with my order because he had some questions about what I really needed. I told him to cancel the order. I decided that I would just order them online so could pay by credit card as I am strapped for cash.

So about 10:30am, I decided I might as well get the test done and watch it fail so I could buy myself another 30 days for my next test. I then headed to a local dealership that handles emissions. I watched as the car failed the OBD test and became completely astonished when the tech hooked up the tailpipe sniffer. People in the waiting room must have thought I was on crack, because I had a grin from ear to ear. When the tech came back with the paperwork, he advised that the car had PASSED! It barely passed, but it passed because I didn't even warm the cat up thinking I didn't need to.

So, I am very happy the parts guy got confused and the parts were not delivered because it saved me a buttload of money.

Cliffnotes to my novel:

-Last weekend, car fails emissions OBD test
-Emissions guy curses me out for wasting his time and money - Never charges me.
-$300-$400 worth of parts ordered from Acura
-Acura parts guy screws up and never orders them
-I go to emissions in my 98 DX and 99 JDM ITR Motor and JDM ecu with no scondary O2 sensor hooked up
-Car fails OBD test
-Tech puts car on dyno for sniffer
-Car passes with a cold cat
-Jay smiles all the way home thanking the Acura parts guy for screwing up and thus saving him alot of money.

 

That is awesome, congrats bro!!!!


ill be tryin to do the same thing with in a couple of months wish me luck!

 

Learn from his mistakes. Warm up the cat first and run high octane fuel.

 

Can you use a USDM oil pump and housing in a JDM Honda engine?

 

You can, but why not just Bypass it?