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Has anyone done this? Any experience using BP26 ECU with 92-93 ATX B6 3 Plug Harness? I thought when I did my turbo setup that it would be easy to just plug in the 2 plugs into ECU and since 4 wire TPS is wired in it would be no problem... seems I am very wrong

According to THIS post which shows pinout of GTX, NA BP, and NA 3 plug ATX BP ECU's I have a TON of re-pinning to do.

This explains why my BP26 ECU was not working... and why I had to use ATX BP ECU on my car (since MTX never semed to work!)

Here are the swaps I have determined I will need to do...

NA>GTX>GTR pin outs
Sorry I don't have the B6 one but I hope this helps

Thanks, had seen that excel sheet... was a good reference along with the ATX NA wiring pinout in the link above.

Jealous of the MTX NA harness folks who just have to move 2L->2M