ECU Compatibilty

[mendozaed20]

I have a 92 accod ex coupe, my ecu is going bad so i need a replacement. Does any cb7 ecu fit? I have heard of people changing them for prelude ones and getting better performance. Thanks for the help guys

I forgot to mention mine is a F22A6 engine

[GeoffM]

PT3 is stock.
PT6 will work.
P12 is a 10hp upgrade

[HATCHing]

P12.... is this a prelude ecu?

[4GAccordH22]

Actually, in an 92-93 EX or a 91/93 SE, the stock ECU is a PT6. You can use a PT3 (Accord F22A1/4 ECU) or P12 (Prelude S F22A1) but you won't have the benefit of the IABs on the F22A6 intake. So for a stock replacement (the best ECU for your engine), get a PT6 out of a 92-93 EX.

[cb7_07]

P12.... is this a prelude ecu?

its just a better tuned ECU for the F22A1 engine. but only found in preludes

[stretch JDM]

I have a 92 accod ex coupe, my ecu is going bad so i need a replacement. Does any cb7 ecu fit? I have heard of people changing them for prelude ones and getting better performance. Thanks for the help guys

the p12 will be plug and play . to answer your question , yes . you can change the ECU with other years , but not the TCU.IMO, the p12 will be a good upgrade for you.

[cb7_07]

the p12 will be plug and play . to answer your question , yes . you can change the ECU with other years , but not the TCU.IMO, the p12 will be a good upgrade for you.

he has a EX model, so wouldnt he be better off with the pt6?

[Chris2388]

I have a 92 Lx. So if I find and buy a P12 it will give me another 10Hp on my motor?

But should I upgrade the intake to get a better reaction from the ECU?

Sorry im not trying to hijack this thread just dont want to start a new one if one is open on the same subject.

[GeoffM]

PT6 is only useful because it can operate the IABs and has no governor.
P12 is from a prelude.
I'd strongly recommend using the correct year TCU. If you go cross year, it'll still work. The shift points will be different though.

[cb7_07]

I have a 92 Lx. So if I find and buy a P12 it will give me another 10Hp on my motor?

But should I upgrade the intake to get a better reaction from the ECU?

Sorry im not trying to hijack this thread just dont want to start a new one if one is open on the same subject.

one of the engines that the prelude came with, F22A1, the same as the DX/LX models of our cb7's, had a better tuned ECU (P12), giving the DX/LX cb7's models a 10 hp increase.


some people swap out the intake manifold from the F22A6 or H23 and use the pt6 from the EX cb7 model. not to mention swapping out the camshaft from an a6 model. which is probably just a little more horsepower gain from the P12 ecu swap.

[Chris2388]

one of the engines that the prelude came with, F22A1, the same as the DX/LX models of our cb7's, had a better tuned ECU (P12), giving the DX/LX cb7's models a 10 hp increase.


some people swap out the intake manifold from the F22A6 or H23 and use the pt6 from the EX cb7 model. not to mention swapping out the camshaft from an a6 model. which is probably just a little more horsepower gain from the P12 ecu swap.

So your saying my best bet would be to get an intake from a F22A6 or H23 and a PT6 ECU to get the best bang for my buck. Correct?

[cb7_07]

So your saying my best bet would be to get an intake from a F22A6 or H23 and a PT6 ECU to get the best bang for my buck. Correct?

you could go that route, yea.

Intake manifold from an EX model or from a prelude with the H23
Camshaft from an EX model
and the pt6 ECU from an EX model

since you have the LX model, you might as well get a header from the F22A4 or a generic header from ebay.

[deevergote]

The misinformation in this thread is going to make my head explode!
Geoff, you don't know what you are talking about, and there are at least 3 people in this thread that don't realize that... Stop incorrectly regurgitating what you read on the forum if you don't understand exactly what you are saying.


A 92 EX (US model) has an F22A6. It has an IAB system, and a PT6 ECU (the only one in that list that operates the IAB... PT3 and P12 do not.)

The PT3 is the ECU for the Accord's F22A1 and F22A4. No IAB control.

The P12 is the ECU for the Prelude's F22A1. It results in a 10hp increase over the PT3 on an otherwise bone-stock F22A1. Putting a P12 on an F22A6 is not guaranteed to give more power. In fact, since you will lose the proper operation of the IAB system (you'd have to run it on vacuum only...) you'd probably lose power rather than gain it!


A full F22A6 running the PT6 ECU and an H23 intake manifold will be the best combination using "stock" parts (as in no aftermarket upgrade parts...)
If you have an F22A6, you already have the best ECU for your car.

[cb7_07]

The misinformation in this thread is going to make my head explode!
Geoff, you don't know what you are talking about, and there are at least 3 people in this thread that don't realize that... Stop incorrectly regurgitating what you read on the forum if you don't understand exactly what you are saying.


A 92 EX (US model) has an F22A6. It has an IAB system, and a PT6 ECU (the only one in that list that operates the IAB... PT3 and P12 do not.)

The PT3 is the ECU for the Accord's F22A1 and F22A4. No IAB control.

The P12 is the ECU for the Prelude's F22A1. It results in a 10hp increase over the PT3 on an otherwise bone-stock F22A1. Putting a P12 on an F22A6 is not guaranteed to give more power. In fact, since you will lose the proper operation of the IAB system (you'd have to run it on vacuum only...) you'd probably lose power rather than gain it!


A full F22A6 running the PT6 ECU and an H23 intake manifold will be the best combination using "stock" parts (as in no aftermarket upgrade parts...)
If you have an F22A6, you already have the best ECU for your car.

i thought my info was right?

[Chris2388]

I have a header my Buddy is seeling me tomorrow. I have never done a cam swap on one of these engines. How hard is it? Im good with a wrench I just did a valve adjustment and shes purrs like a kitten now. Do I have to mess with the cam gears and stuff like that?