Is the CEL on? The input speed sensor wouldn't usually cause a surging as it doesn't send information the ECU uses for the engine, that all comes from the cam and crank sensors and the MAP and MAF sensors. It would cause shifting issues and if it is bad it would set a code. As for it's location, it is inside the transmission and it has to be torn down some to get to it. Book time of 7.5 hours.
I have seen surging caused by multiple items, a dirty MAF sensor, bad fuel, Dirty throttle body, and more. I would probably start by checking the live data with a scan tool to see if it shows anything related to the surging. Then I'd test the ignition coils and injector flow rates.
SPONSORED LINKS
Sunday, July 5th, 2020 AT 12:06 AM