Asked in Crankshaft Sensors
What does a crank sensor do?
October 06, 2010 10:52AM
The crank sensor (real name is crankshaft position sensor)
senses when a notch on the crankshaft goes by and sends a pulse to
the car's computer. This tells the computer where the crankshaft is
in it rotation so that the computer will fire the spark plug at the
correct time. This also allows the computer to change the timing
under different conditions such as if gas of too low an octane
rating is being used causing predetonation (called knocking) which
is sensed by the knock sensor.