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#1
03-03-2004, 01:26 AM
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Knock sensors
I have a code 43 on my check engine light on my '93 Chevy truck that has a 5.7 and according to a local automotive parts house I should check the knock sensor and associated wiring for loose connections and such. Where is the knock sensor and how would I check it?
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#2
03-03-2004, 12:15 PM
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KNOCK SENSOR WE HAVE A VERY SIMILAR TRUCK.  YOUR KNOCK SENSOR SHOULD BE DIRECTLY IN FRONT OF THE STARTER, IT THREADS INTO THE SIDE OF THE BLOCK. THE ONLY METHOD THAT I AM AWARE OF TO TEST IT IS: -HOOK UP A TIMING LIGHT -ENSURE YOUR TIMING IS CORRECT -WHILE WATCHING THE TIMING, TAP ON THE BLOCK WITH SOMETHING METAL (TIMING SHOULD RETARD) -IF NOT TAP HARDER  -IF IT STILL DOESNT RETARD, YOUR SENSOR IS PROBABLY BUNK GOOD LUCK -12 ga 
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