Are these fuel maps pretty similar? I would assume not, but it would be very convenient for me if they were. I just bought a 94 civic with a 00 spec JDM ITR swap. It has a chipped P06 OBD1 ECU.

I'm removing the swap and putting it into my 99 EM1. EM1s are all OBD2B. I don't want to run the chipped OBD1 ECU in my EM1. I would rather just have a stock ECU.

A shop has either the OBD2A ITR ECU along with a OBD2B to OBD2A conversion jumper. The jumper harness is $140.

Or they have the OBD2B CTR ECU. I would like to avoid using the jumper harness since it's an extra $140. It'd be nice to just plug in the OBD2B CTR computer and roll down the road.

But I do want to make sure that the fuel maps are either very similar or the same. If not, I guess it's only another $140 more for the jumper I would need to run a 98 spec (USDM?) ITR ECU that's OBD2A.

Thanks in advance for any help, guys.

 

obd1 + tuning is the key.
Seriously, even for stock engine it's good for power and fuel economy, stock ecu are not that good.

My stock 96spec type r 189whp get better gas economy than my old d16y8 on the highway and I rev at like 4300rpm all that time.

Running S300 + street and dyno tuning.

 

Evasive motorsports has the conversion harness for $79 + shipping if you're willing to purchase it on your own instead of the shop.

http://www.evasivemotorsports.com/Me...ode=OBDHARNESS

If the JDM ITR engine is a 2000, then the ECU should be OBD2B like the EM1 harness plugs. You shouldn't need a conversion harness.

It really depends on which ECU you're getting. Just call up Steve at HMotors and buy a 2000-01 JDM ITR P73. It should plug right up to the EM1 harness.

 

Didn't the OBD2B ITR ECUs all have an immobilizer, though? I don't wanna deal with all that.

The engine is a 2000 spec, I think. The stamp says "02" on there. I have no clue if that was one of the last sold as a 01 model or...what? Or does it say "20" for 2000? My EM1's head says "99". Nice and easy.

However, regardless of what spec the engine is...it came with a chipped P06 OBD1 ECU. I don't want a chipped ECU.

Thanks for the link to Evasive, however.

 

only from america and the only way to get around that is to have a car that has an immobilizer on it like my friend had an accord with an immobilizer and he bought a prelude motor from someone that totaled their car and all i had to do was switch over the immobilizer circuit and it ran fine, but i do believe that em1's dont have an immobilizer...

also jdm ecu's dont have an immobilizer

 

If you are going to run a USDM Ecu with a JDM motor I believe you'll need to put a crank angle sensor on your motor and either use a USDM VTEC solenoid or rewire the VTEC.

 

I have a USDM VTEC solenoid. I was planning on using that. However, I wouldn't need to run the CKF. I just do the CKF trick when I swap OBD1 engines to OBD2 cars running OBD2 ECUs. No CELs. No problems. I'm only doing the CKF trick and running a USDM solenoid because I will swap my stock EM1 ECU back in for emissions testing.

I keep finding things out about this engine. I recently pulled it out of the EG I bought it in and put it aside in my garage. While removing the intake manifold, I made a weird discovery: Apparently it has an Endyn head? The back of the head has "Endyn" engraved on it. The head is also ported. It didn't sound like it had cams...but I've heard that something like a skunk stage 1 cam setup is not very detectable.

I have no clue. It rips WAY harder than my friend's old ITR swap. I'll have to look more closely at the valvetrain tomorrow morning.

My plans are to run a stock ITR OBD2A ECU since that's what's readily available. Even if the engine has aftermarket cams, I figure they're pretty mild cams since the car idled totally normally. I might run Hondata or something in the future when I'm ready to go more indepth with it. I just want it in and running for now.

We'll see where this goes....

 

pick up a USDM OBD2a P73, a conversion harness (OBD2b-OBD2a) and plug it in.
emissions friendly and it will run fine unless the porting and cams are a lot different.
CKF jumper and your stock emissions will work fine.

running the EM1 ECU for emissions is not a good idea, the higher flow head and leaner maps in the ECU will cause even leaner conditions.

Keep in mind it really depends on what's done to the head. If the cams are significantly different or the flow is a lot more or your compression is up (or combo of all of these) you will require tuning for it to be reliable.
Idle smoothly is not a good determining factor... I've seen heads that are ported to extremes still idle smoothly. (it's not easy but it can be done)

 

i would check the cams first. if they aren't itr cams you really should run a tuned ecu. if they are itr cams the p73 ecu with the 2b-2a harness sounds like the easiest route.