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Pull of the plenum and all hoses connecting too and mark all hoses your not sure about like vacuum hoses. Now unbolt the intake off the engine and u will see a sending unit looking thing in the base of the engine leading down toward the engine. Unscrew the old knock sensor out and replace with a new one. Put everything back on reverse order. be sure to install a new intake gasket when your in the engine.

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Q: How do you replace a knock sensor on Toyota truck 1989 3.0 v6 engine?
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