I read a past post about testing your knock sensor. Key on wire off makes 5 volts.Wire on sensor,probe back of plug and should be about 2.5 volts. Mine shows 9 volts on both sides of the test. It just started having intermitent knock problems and shows the ESC code. It is the original at 120000 miles,its a 86 305 TPI.Does this sound like a problem with voltage to anyone?? Thanks Allan

Well Alan, are you talking about the TPS or the knock sensor?

Check your title to your post.

oops,yes that is for the knock sensor.sorry