[SLguy]

Originally Posted by BigTyla

I am fairly confident that it will, but I don't want to go on the record on that until the proper testing is done.

Thats where I come in.

Originally Posted by templar

I'm not sure because I've never done it, but I do know that 2nd gen TT ecus use a 4 plug harness into the ECU (whereas all NA has three plugs) and that all 2nd gen ECUs control the radiator fan. So at least those things need to be connected correctly.

not exactly 100% true, 94 & 95 federal spec cars will have to use the 1st gen TT ECU (3 connectors), whereas cali spec cars will have to use the 2nd gen ECU (4 connectors). All 96+ cars have 4 connectors.

But you are correct on having to come up with your own fan wiring technique on all 94+ models.

I've done this on my 94 using a 92 TT ECU, car starts and runs fine, just haven't taken it out for a drive yet because i'm still doing body work. At the same time, i'm also using a 91 CAS with 91 style heads. For 94 and 95 Federal spec cars, i would try to spec out a 93 ECU just for CAS purposes. You can still use a 91 or 92, your timing just might be a couple of degrees off because of the different CAS sensors. just a tip