Alright so it sounds like a possibility, the way i tested the sensor was i took my volt meter put it on kohm and that was the result. I put both prongs into each end of the sensor, how do i measure each sensor pin separately. I also suspect that my ignition coil could be the culprit because it give me different readings from day to day which means it could be shorting out inside. Im going to swap my 91 300E coil into the 89 or with a 90 190E (2.6L) , are they the same one? both M103 engines only difference is that the 89 is set up front to back while the 91 is set up side to side. Ive been reading about coil problems and thats about the only thing left that hasnt been replaced since ive had it and the problems consist of intermittent starting, rough idling, low torque...which im experiencing all three. Thing that puzzles me is the coil is within spec so we'll see from the swap.