just to chime in here, most of the time the throttle plate is fully open, VVEL is controlling air flow and sending a simulated TPS signal back to the ecu. Charles at CJM (Phunk) confirmed this and had tuning issues using a return kit with a FPR. He basically said he had to disconnect the vacuum source as the cruising/off throttle vacuum was not correct/consistent since the throttle plates where not actually closing entirely.
Also, there still are no fuel tip-in maps as far as I know, but they are working on them.
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