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factory unmolested ecu from a factory rb20det gtst skyline r32. i have tried feathering gas with cas at fully counter clock and also fully clock wise. ive tried WOT and no throttle and partial throttle and tapping throttle. the ECU was previously running a 30DET (poorly) but dont see how that would change ecu's inner workings.
the small puff of black smoke makes me think it is fuel related..?
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