obviously karlos g giving out odd information as the 3 i've got here all only click once maybe he could up load a video for us of his clicking twice and the voltage along with it as as far as i'm aware they click so ecu knows when to run fuel shut of when slowing down as those with afr's in car will have noticed the guage read in the 20's when off throttle slowing down and it reads full throttle via voltage from tps not a click