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matt would know if its ok, since he's aware of what he's planning to do when he says the ecu will run the throttle, i don't know the specifics there.
If he's planning to pick up the pedal position sensor which is prior to the ecu, or somehow let the ecu just run the DBW controller and not be in control of anything else, that seems unlikely to me since the ecu will be asking the engine all sorts of questions and if it doesn't respond the way it expects, it'll throw codes, and most of those codes will put it it in limp home mode, which in turn will cause the throttle software to limit the range since it'll fail the tests.
changing out the ecu, dbw to a manual and all that seems a long way to go about things, but if you're not near someone who can do it without going that route.
the efi usa guys took a couple of years to get the DBW stuff sorted out, for one reason or another, so i'd go with them if you're going standalone and contact kris@drs.
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