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Try checking the throttle stop screw setting first and then adjust your TPS. Back the stop screw out and then turn it back in until the end of the screw just comes in contact with the throttle stop lever and then give the stop screw about another 1/16th of a turn. The fuel injectors are switched off by the ECU during deceleration with your foot off the gas and get switched back On once RPM drops to 1200 RPM.
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