Right ECU on F22A3 butterflies?

[MrSpeedy]

I know the ECU what i need is pt6 but what i've found that there are lots of those and the main diffrence in the part# is the last 3 digits. I've got 5speed manual trans, and i'm going to install the F22A3 intake manif. on F22A1. What is the right ecu part that i'm after? And also if someone know what is the difference between those ECU's besides manual/automatic transmission? I've also read about the P06 ECU from civic, but when would it be time to go for tunable ECU like P06 rather than PT6?

[deevergote]

I wouldn't go with a P06 unless you have the tools and knowledge necessary to tune it properly (or access to someone that does.) I usually tell people that until you get a real cam upgrade (not an OEM cam, but a performance cam) that they really don't need to tune the ECU. This is especially true for the F22A, since it has a pretty good tune from the factory (the H22A is a bit rich, and can gain a bit from a tune in near-stock form.)

Anyway, I'm quite sure the F22A3 intake manifold is identical to the F22A6 manifold... so following what the guys in the US are doing should work well for you. As far as I know, all PT6 ECUs have the same fuel map. I've been told that it doesn't matter if it's auto or manual (at least if it's going on a manual car), but I would try to get one that is right for whatever your car is, just to be safe.

There is a way to hook up the butterflies to work via vacuum as well, though I don't know how exactly. The information should be on here somewhere. If you do that, you could continue to run your PT3 for the time being.

[MrSpeedy]

I wouldn't go with a P06 unless you have the tools and knowledge necessary to tune it properly (or access to someone that does.) I usually tell people that until you get a real cam upgrade (not an OEM cam, but a performance cam) that they really don't need to tune the ECU. This is especially true for the F22A, since it has a pretty good tune from the factory (the H22A is a bit rich, and can gain a bit from a tune in near-stock form.)

Anyway, I'm quite sure the F22A3 intake manifold is identical to the F22A6 manifold... so following what the guys in the US are doing should work well for you. As far as I know, all PT6 ECUs have the same fuel map. I've been told that it doesn't matter if it's auto or manual (at least if it's going on a manual car), but I would try to get one that is right for whatever your car is, just to be safe.

There is a way to hook up the butterflies to work via vacuum as well, though I don't know how exactly. The information should be on here somewhere. If you do that, you could continue to run your PT3 for the time being.

Yeah, i also agree that it is probably the same as in F22A6. I've got the ECU and it's automatic, guess I could try that one first. Is there something that could mess my engine with the wrong ECU? I'm not doing any REAL upgrades, atleast not right now so I should just stay away from the P06. I haven't also figured it out how to connect the vacuum for the butterflies, but i'll try to search it. Didn't really know that the ECU's could work like you said. I've always thought that they are manual or auto. Thanks for the enlightment!

[deevergote]

No, you won't do any damage with the wrong ECU. The differences aren't great enough for it to really matter. The worst thing that will happen is that your car won't run as well as you'd like!

I believe there are differences between auto and manual, but I don't know exactly what those differences are. The transmission is controlled by the TCU.

[MrSpeedy]

I got the new ECU out of the car and it's PT4. Pins are exactly the same as in PT3. So i'm going to try that when I get the IM installed. I'll let you know when i'm done. What about the o2 sensor, it's different on F22A1 and F22a3, does it really matter cause the ECU SEEMS to work on F22A1?

[deevergote]

the sensor is the same, the location is probably just different. The wiring is a different length, and the connector is different.

I'm assuming that the F22A3 is petty similar to the F22A6.

[darkfusion42]

Yeah, to add a little, (while I'm no expert) the only difference between an auto and a manual ecu (from what I understand) is that the auto pulls back on the fuel (or something iDK lol) a little right before the shift point to make it smoother. It supposedly works with some signal from the TCU. Dont take my word for it, though. Bottom line is, there isnt really any difference (or none that can be noticed).

And there is a DIY on here about running the butterflies to vacuum, give me some time when I'm at home and not at work and I could find it Iv'e got it printed out at home! There isnt much difference going that route, I think it is a bit easier, just comes on at a slightly different RPM. Working off just memory i want to say there is a link to it in one of the stickies in this section.


:EDIT:
I was going to search for the thread on the vacuum hook up, then found this
http://www.cb7tuner.com/vbb/showthre...anifold+vacuum
might be a better oprion to go ahead and do it the right way

[deevergote]

If the ECU cuts fuel based on a signal from the TCU, then I would say an auto ECU would be necessary for an automatic, but either one would be fine for a manual.

[MrSpeedy]

Thanks for the clear answers and nice link! I was going to control the butterfly valves on a straight vacuum line but after this i gotta figure out how to connect the ECU to control the valves. Nice post! I think i'm going to do this the right way so I don't have to do it again later.

EDIT: One question about the butterfly valves is that does the LX harness on the ECU got an empty slot on A17 pin (pink one) or does it exists but doesn't connect anywhere? I'm almost done with the mind process of the swap. Also i've read that alot of people the solenoid is not working, is there a way to test this before doing the swap?

[MrSpeedy]

Gotta newsflash! I've been phondering my idle on another thread. Basicly I haven't got any answers there. But I think I found my problem and it is most likely the auto ECU. So this weekend i'm going to check that changing my old ECU back and if the idle problem solves it means that auto ECU doesn't fit manual. Atleast not the completely. The car is driveable with the auto ECU.

[904drACCORDMANG]

the difference in idle from auto to mani ecu is 50 rpm so it shouldnt affect your idle much infact im runing a jdm auto pt6 and i have no idle issues

idk anything about the a3 but i know the pt6 is tuned for the a6 cam so that might be somethin to look into as well

[MrSpeedy]

the difference in idle from auto to mani ecu is 50 rpm so it shouldnt affect your idle much infact im runing a jdm auto pt6 and i have no idle issues

idk anything about the a3 but i know the pt6 is tuned for the a6 cam so that might be somethin to look into as well

I think you are right on that. I still got the a1 cam and going to install the a3 on it as soon as possible. I haven't found anything that could lead to this sort of problem. So changing the ECU back i'll get new information. But when I get my cam installed then i'm going to try the auto ECU again. Keep you posted!