i tested my tps today because my car wasn't wanting to idle and i adjusted it so that the resistance was 1 K ohms, but when i go to Wide Open Throttle, it only goes up to 3.9 K ohms and the FSM says it should be at 5 k + or - 1 k ohms. so mine is right under that i get get it to go any high under WOT. is my tps need to be replaced or is it still good?