My 2 preludes in the netherlands bb9 and bb6 JDM type S

[Merlin]

Are you using the Type-S ECU?

[Dennis van dijk]

Yes i want to use the complete type s wiring and ecu on the h22a2

[Merlin]

You will need to still need to fit a knock sensor for that as well. I am doing the same as you but in reverse, converting an OBDII engine for use in an OBDI car.

[Dennis van dijk]

Ok

But there both obd1 as i know

[Merlin]

The Type-S? That was only ever OBDII.

I am sorry if I have jumped in here (unfamiliar in what you are doing / have already done). You will need to do a few things to get the H22a2 to work in your car or figure workarounds. Off the top of my head:

Fit the OBDII injectors to the H22a2

swap the VTEC solenoids (if the Type-S one does not have the oil pressure sensor on it, the H22a2 does have an oil pressure sensor on the VTEC solenoid Edit- I suppose you simply dont attach it )

Have you though what you are going to do about MAP sensor? (the Type-S will have it on the TB whereas the H22a2 has one mounted externally on the firewall)

Retrofit a knock sensor to the H22a2 or the Type-S ECU will throw a code.

Do you have the H22a2 gearbox strengthening brackets and flywheel cover plate? On the 5th gen it uses a load bridge to attach to the gearbox and increases strength, I suppose the Type-S probably has a different method of attachment, but you'll still need the strengthening brackets and flywheel cover plate for the H22a2.

If you want to use your old dizzy and alternator you will have to use a 5th gen engine loom.

[Dennis van dijk]

Ow ok

I realy tought it was obd1 because it doesbt have an immobilizer

But than its more work to do

I realy need to think about this

T problem is somebody raped the harness of th h22a2

Thats why i tought to take my harness on the h22a2

[Merlin]

It doesn't have much to do with the harnesses, it is the difference between OBDI and OBDII. OBDI engines have a simple set of sensors that the ECU uses to calculate how to run the engine. OBII engines have a further layer of sensors on top of what OBDI engines have.

If you use an OBDII ECU with an OBDI engine the OBDII ECU will "freak out" as it cannot see a load of sensors it needs to run the engine. Most people swapping OBDI engines into 5th gens never run into this set of problems as they generally use OBDI tunable ECU's (P28, P30, P72 + Hondata S300 etc...).

The extra layer of sensors in OBDII systems is also the reason why the 5th gen responds much less to engine mods (in comparison with the 4th gen), the ECU is constantly trying to pull the engine back to OEM specs.

I realy need to think about this

I don't have enough experience to give you a complete list of things that need done, I was just wondering if you realised that it isn't a straight swap.

[Dennis van dijk]

Realy thanks for the info

I realy tought it whas a straight setup do to

Get it in and drive it in a couple of days

[Merlin]

No probs. I took a quick look on the net about OBDI -> OBDII conversion and I saw a couple of pages that said you need to swap the oil pump Not sure what that is about. http://honda-tech.com/honda-prelude-4/o ... o-1053816/

[Dennis van dijk]

Ow ok

Im going to think about it

Its a lot of work haha