Note for us going from A1-4 to A6 swap

[Bravo-man]

Well I have been looking around because I know there was a difference from a A6 auto to a A6 manual. If you will be doing this swap the ecu that you get needs to be a pt6-A12 for manual trans and pt6-L51 or L52 for auto there is a difference.

[Tippey764]

and the difference is?

[Bravo-man]

Well this was in 98 when I did my first build they are different part#'s. Then if you both ecu's try them out people say that it will not fuel on the auto ecu with out the tcu but it does. When your shifting the the pt6L51 will hold RPM and your pt6A12 will not. This is for a manual trans. Sorry for the wording but am at work.

[9DUBWISE]

When I did my swap the T bracket gave me hell. "Why wont it sit down? Dont you like your home?" 3 mins later I saw the taller A6 bracket in my parts box. DUH!!!!!!

[Bravo-man]

When I did my swap the T bracket gave me hell. "Why wont it sit down? Dont you like your home?" 3 mins later I saw the taller A6 bracket in my parts box. DUH!!!!!!

Lol

[PakaloloHonda]

then what is the pt6 A12 for?
I have a manual 92LX with a f22a1 and am putting the H23 mani in ..
Should I be using another ecu?

[Bravo-man]

The Pt6A12 ecu is for the manual trans.

[PakaloloHonda]

The Pt6A12 ecu is for the manual trans.

Good, cuz I just bought this .. and I know I could run an automatic ECU in my 5 speed,
but why .. when it's just as easy to buy an ECU that is designed for my 5 speed.

[Bravo-man]

Yea I have that same ecu I am not saying in no way you can't not use it. It's just that if you get one from an auto when you go to shift it will hold RPM for a bit and the map is I bit different.

[visualpoet]

Yea I have that same ecu I am not saying in no way you can't not use it. It's just that if you get one from an auto when you go to shift it will hold RPM for a bit and the map is I bit different.

It shouldn't hold RPM when you shift. If you're experienceing throttle stick, you might want to try cleaning and lubing your throttle linkage. Or lifting your right foot a little sooner than your left when you shift. The only difference should be in the map, the curve for an auto would be different than the curve for a 5 speed, but unless you're using the cruise control, nothing should make the throttle stick when you lift your right foot. NOTHING.
That's how accidents happen. You let off the gas and it doesn't release.
I can almost guarantee you that's not from the ECU; if it is, you have a problem with the ECU.

If the car were newer and had a drive-by-wire system, I could see it, but throttle control is purely mechanical in our cars, the pedal tells the throttle body what to do, the ECU has no control over throttle position.

[Bravo-man]

Well I wish it was a sticky throttle but I have two pt6 ecu's and both do it when I put back in my pt3 it doesnt. I have tried lifting off the gas a little sooner to I have driven a manual for 14 yr's now and I can tell you that I don't think it's me.

[visualpoet]

Is the pt6 activating your IAB? Maybe the linkage is catching somewhere. The pt3 wouldn't cause the problem since it can't activate the butterflies.

I can't say I've ever heard anyone mention the throttle staying open a little longer with the a6 IM swap before.

[Bravo-man]

Ok I will try and find out what is happening. I will put a volt meter on my IAB when I'm driving around to see when my IAB is opening and closing.
And yes my PT6 is activating the IAB

[visualpoet]

Since it's only doing it with the pt6(s) I'd start looking at the IAB first. It may be holding open a touch longer than it should. Try running it with the pt6, but unhook the IAB (which will leave the butterflies open) and see if it still does it, then try it with the IAB disconnected, but the butterflies held closed temporarily with a twist tie or something on the linkage and see if that makes a difference. If there is a difference, you've found the where, just not the why.

[YK86]

If there is a "boost" in the rpms with the auto ecu, it may be from the IACV. I am running an auto pt6 in my car that I converted from a4 to a6 and auto to 5 speed and I don't notice any boost. But I do also have a lightened flywheel so maybe the boost is helping my car feel more stock by not allowing the rpms to drop as fast as a normal car with a lightened flywheel would....