I am thinking about installing a standalone ECU in a Q4, due to a series of quite big engine modifications (incl. 3.5 conversion, injectors, ported heads and so on). Does anybody have any experience about this? I was thinking about possibly a Haltech ECU, as it seems to have quite good flexibility concerning adaption.
I don't see a problem concerning the engine management, but due to the Viscomatic and ABS being connected to the Motronic, i can't wrap my head around how i would get that to work. Does anybody have any ideas?
For the technical things.
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