The throttle potentiometer supplies a signal to the ECU, after which a correction or adjustment of the ignition curve is made. So it is a kind of sliding contact which transmits a changing resistance value to the ECU / ignition unit. The sensor is subject to high stress and wear, eventually leading to incorrect ignition resulting in poor performance, misfiring or even total failure of the ignition system.

This TPS throttle position sensor is suitable for Chinese 4-stroke carburettor engine with Euro 4 emission standard.