H22 Euro R to Obd1

[blackenwkn]

Alright well I've done some reading, but I'm not experienced enough to understand everything. So please bare with me.

My car currently has the Euro R swap in it. I had a shop put it in a while back and looks like he has it converted to obd 2(dizzy,injectors, and Ecu with jumper harness). I'm wanting to convert to obd1 to run p28 and tune. I bought a replacement harness a while back and am looking to re-do/ tuck it better.

To my understanding I need to swap the dizzy(usdm H22) and injectors to obd1 correct? Is that all that will need to be done? Thanks for your time!

[Jarrett]

The first thing you should do is pull up the carpet and read the code on the ECU. That will give some insight as to how he completed the swap.

[blackenwkn]

The first thing you should do is pull up the carpet and read the code on the ECU. That will give some insight as to how he completed the swap.

It's a p5m, he has an obd1 to obd2 jumper harness to run the ECU


Off topic but I see your in denton? Nice I'm in ft worth, are you aware of the Texas Accord Meet next weekend?

[Jarrett]

Yeah, I transferred up here to work on the I-35E widening project.

I see y'all posting on the Facebook group all the time. I actually don't have my Accord up here, just my CL-S6. Either way, I'm not really a meet person.


If the engine is running correctly, and you're okay with the way any adaptive wiring was done in the bay, you could just dress up what's there and run a tuned P28 as-is. You'd need to remove the jumper, but then it should plug right in.

[blackenwkn]

Yeah, I transferred up here to work on the I-35E widening project.

I see y'all posting on the Facebook group all the time. I actually don't have my Accord up here, just my CL-S6. Either way, I'm not really a meet person.


If the engine is running correctly, and you're okay with the way any adaptive wiring was done in the bay, you could just dress up what's there and run a tuned P28 as-is. You'd need to remove the jumper, but then it should plug right in.

I was thinking about just leaving it but my dizzy has I believe and obd2 (b)? Plug where it's I believe 9 wire? So it's kinda rigged with a single wire drilled thru the cap and then ran to a blue wire on the harness for the rpms on the cluster, I just wanna eliminate all the bs and get it to where it's perfect and simple. I already have the harness and have ordered some 350cc injectors I think the euro rs are 310? So I'm just wondering if I'll need just a 92-96 h22a1 usdm dizzy and a chipped p28. If that's all I'd need I'd like to go that way just nervous since there's not a ton of information for the euro rs like the standard h22a1.

Plus once I start adding performance mods I wanna get a good tune.

Oh man I bet your having fun with that construction, check out accord club dfw on facebook a few of us locals are on there and posy regularly.

[Jarrett]

Yeah, any distributor from a '92-'96 Prelude Si/Si VTEC will work. Just as long as it was DOHC. Or, you can modify your current distributor with the internals from your old F22A distributor if you still have it.

But yeah, use the new harness, install and connect the new distributor and verify that the new injectors you have will work in this application. I got a fuel rail Rosko Racing so I could run the RDX injectors on my Euro R manifold. I know you've already purchased new ones, but that's an option for you later.

[blackenwkn]

Yeah, any distributor from a '92-'96 Prelude Si/Si VTEC will work. Just as long as it was DOHC. Or, you can modify your current distributor with the internals from your old F22A distributor if you still have it.

But yeah, use the new harness, install and connect the new distributor and verify that the new injectors you have will work in this application. I got a fuel rail Rosko Racing so I could run the RDX injectors on my Euro R manifold. I know you've already purchased new ones, but that's an option for you later.

Yea rosko racing seems to be the place to get anything for the EuroR manifold. I bought the injectors from a member on here who had them on their h22 swapped cb7, just recently went turbo so it was time to upgrade. Got them for a pretty good deal so they should do the job for now.

Random question but do you need a euro r specific fuel rail or will a standard h22 let's say aem work? Thank you for your help and reassurance!!


EDIT--- yes I will rosko racing has adapters since the euro r mani has 3 bolts compared to 2 for the standard Manis

[deevergote]

To avoid "reverse engineering" whatever creative wiring the guy that installed the engine did, it might just be easier for you to find a complete CB engine harness in decent condition and just swap that whole thing over. Add your own wires for the OBD1 H22A installation as per the instructions in the Swaps section, buy the OBD1 H22A distributor and injectors (and if it's been removed, replace the injector resistor box as well).

Replacing the entire harness can be a major headache, but it'll give you a better chance of getting things right. Since you're far from an expert, trying to undo custom work without a thorough knowledge of what you're fixing could end up being a major frustration. Plus, if you just pull everything out whole, you'll have that complete OBD2 "conversion" ready to go. Either to reinstall in your car, or sell to someone that bought a Euro R of their own, and doesn't feel like converting it to OBD1.

[blackenwkn]

To avoid "reverse engineering" whatever creative wiring the guy that installed the engine did, it might just be easier for you to find a complete CB engine harness in decent condition and just swap that whole thing over. Add your own wires for the OBD1 H22A installation as per the instructions in the Swaps section, buy the OBD1 H22A distributor and injectors (and if it's been removed, replace the injector resistor box as well).

Replacing the entire harness can be a major headache, but it'll give you a better chance of getting things right. Since you're far from an expert, trying to undo custom work without a thorough knowledge of what you're fixing could end up being a major frustration. Plus, if you just pull everything out whole, you'll have that complete OBD2 "conversion" ready to go. Either to reinstall in your car, or sell to someone that bought a Euro R of their own, and doesn't feel like converting it to OBD1.

That's exactly my intent, I already have a full stock harness sitting and I've purchased a set of injectors so all I need now is the dizzy. I've pulled the motor since then and have re routed everything so the harness swap will be pretty easy. I'm just trying to make sure nothing will differ from the euro r and standard h22. Trying to eliminate any frustration now lol.

Thanks for your response!

[deevergote]

There are some screwy things with the intake manifold I believe. I think cp[mike] may have posted on that topic in the past. Everything regarding the OBD2 to OBD1 conversion should be the same as the regular H22A, though.

The harness swap will be much easier with the engine out, for sure!

[blackenwkn]

There are some screwy things with the intake manifold I believe. I think cp[mike] may have posted on that topic in the past. Everything regarding the OBD2 to OBD1 conversion should be the same as the regular H22A, though.

The harness swap will be much easier with the engine out, for sure!

Yea I don't argue that, I'm pretty skinny so that should help lol. Yea that's what I'm trying to figure out, I'm aware of the iacv adapter to run our standard 2 wire iacv. I'm trying to remember if I noticed anything else when I had the motor out but I'm not 100%.