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Yes indeed.

You need to find the wire that runs from the ECM to the sensor. Many times the wiring diagrams are off (pin numbers) or the wire colors do not match the diagrams. So unless you can see the knock sensor and trace back a wire, you will need to check the continuity of the "suspect" wire to make sure you have the right wire. You will likely need to pull up a wiring diagram from a web site to assist.

(For instance a Quest or Villager wire number is actually 63 at the ECM, but the diagram for the Quest says 64. The right wire is white, but it looks yellow from age. NCA means a noise suppression gray tape wrapped around bare wire. The book says it is black/red wire. The engine compartment sub harness is not the one in the book - so the pin numbers are useless. The pigtail connector from the sensor is located behind the manifold cover and can not be touched or seen by a human, etc.)

Then cut the wire and connect it to a new Knock Sensor ($60 - $200). Mount the new knock sensor any old place as long as it has a good ground. Many sensors bolt thru the middle (donut) and the bolt is the ground.

The reason you need a knock sensor is that it is an active piezoelectric device. Meaning it sends a voltage to the engine computer. No voltage = bad sensor = warning light.

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17y ago

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