P5m Ecu?

[DariuszZ]

Just like the title says. Is it possible to use p5m ECU (manual tranny) with my 98 h22a4 obd ii. The ECU came with that engine. How hard would it be to plug it in? Do I need any conversion kits of some sort? Thanks a lot.

[deevergote]

To use an OBD2 ECU, you'll have to convert your car's wiring harness to OBD2... definitely not something that I would want to do, personally. It can be done, but it's MUCH easier (and leaves much less room for error) to simply get an OBD1 P13.

[DariuszZ]

i understand that p13 comes from any 92-95 prelude VTEC only right? And p28 is civics? Do you know which year and again vtec only or stock motor as well?




Just to make sure. Is this OBD II?

I can't connect those wires to my stock accord?

[DariuszZ]

also people say its "better" to use P28. Why? Whats so good about civic's ecu vs prelude?

[deevergote]

The P28 can be modified to be tunable, whereas the P13 cannot. You do not need a P28 at this time.

If this image works, it should show you the difference between ECU plus. My computer is having issues, and I'm only able to view the small version on Google, which wasn't very clear. I believe this is the one that shows what you need to know, though.
http://ff-squad.com/tech/ecu/ecu.plugs.jpg

[DariuszZ]

So at this moment all i need is p13 obd1 (even though my h22a4 comes from 5th gen prelude), plug it in and we should be good? Do i need a knock sensor as well? Do you know the stock mods of p13?(RPM limit, vtec hit). thankyou

[deevergote]

You will essentially need to convert your H22A4 into an OBD1 engine... basically, that involves replacing the distributor and fuel injectors with parts from an H22A1 (well, an OBD1 H22A... the JDM H22A parts would also work fine.)

But yes, the P13 is the only ECU you should be looking at. There's no need to run anything tunable until you have mods that require tuning, and you understand what is involved in that process.

[DariuszZ]

my f22 distributor wont work is that correct? H22a1 is 92-96 prelude? i guess its time for me to have an adventure trip to the scrap yard

- Distributor
- 4 fuel injectors OBD1
- P13 (and i will not have to cut any cables, just plug right in?)
- No knock sensor?

Any advice for good quality fuel injectors?

thanks a lot.

[deevergote]

Yes, H22A1 is the OBD1 H22A (92-95)

You will need a knock sensor, yes. I forgot to say that in the last post. All H series engines require a knock sensor.


As for the fuel injectors... it's hard to say. Visually inspecting them for damage is about all you can do. It'd be smart to send them off to get cleaned (and balanced, if you really want to do it right...) but not absolutely necessary. I've never done that myself. Then again, I never had to buy injectors.

[DariuszZ]

Will this work for my knock sensor? http://cgi.ebay.ca/Honda-Knock-Senso...ht_1843wt_1137

how come H's don't have a knock sensor already installed?

[deevergote]

They should. That's what happens when you buy a used engine. I believe all Honda knock sensors are the same. I'm not 100% positive, though. Your best bet is to cross-reference Honda part numbers to make sure.

[DariuszZ]

Will do.
Last question
Since P13 is OBD1 and cb7 is OBD1, i will not have to buy any wiring conversion kits. It will plug right in? Do i have to make some wiring changes?

[deevergote]

It will plug right in, yes. You will need to add 4 wires for the H22. That SHOULD be covered pretty well in the Swaps section of this forum. I don't know them offhand (I paid to have my swap done back in 2003... the shop did a lousy job, but their wiring was the one thing I haven't had to redo yet... aside from taping exposed connections!)

[DariuszZ]

alright thanks alot. yea ive seen a howto section on wiring. wish me good luck