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Old 09-08-2009, 05:26 PM   #1 (permalink)
IsaacCarlson
eco....something or other
 
Join Date: Jul 2009
Location: Colfax, WI
Posts: 719

wood hauler - '91 Ford F-250
Team Pontiac
90 day: 18.97 mpg (US)

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knock sensor question

my chilton book says the sensor provides 8-10 volts to the ecm. when knock is detected that current is cut and timing is delayed up to 20 degrees. if i unplug the sensor that will cut voltage and timing will be delayed 20 degrees correct??? "loss of signal to ecm will cause constantly retarded timing"

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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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