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I also had problems with the non-oem TPS (two broken aftermarket units, two ruined track days). The BMW unit was much more stable. I think the potentiometer is more ‘curve’ than linear though, and it still gave me problems with tuning (persistent backfires at low-rpm tip-in) so I ditched it for a hall effect sensor which allowed me to use Alpha-N with a lot of success.
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Mike
1980 911 SC 3.1 Coupe // 1986 VW Vanagon Syncro EJ22 // 2015 Macan Turbo // 2017 i3 REX
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