VSS pulsewidth

SC_crawler

Registered User
Does anyone know what pulse schedule the stock VSS puts out? 3 pulses per revolution of the ouput is fairly common, but I'm not sure what the Ford output is.

Thanks
 
Found this quote... not sure if it's accurate or not though...

The Vehicle Speed Sensor produces 8 pulse per rotation which a stock computer assumes 8000 pulses per mile.
 
Here is what the book says:

The Vehicle Speed Sensor (VSS) is a variable reluctance sensor that generates a waveform with a frequency that is proportional to vehicle speed. When the vehicle is moving slowly, the sensor produces a low frequency signal. As the vehicle speed increases, the sensor produces a higher frequency signal. The processor uses this signal to control fuel injection, ignition timing and transmission/transaxle shift points.
 
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