Knock sensors detect pre-ignition. (also called detonation, premature combustion) Which can occur due to over-advanced ignition timing, "bad gas", or underrated octane for the design of the car. Putting 89 octane fuel in a car that requres 93 octane will cause engine knock. As the engine vibrates, the Knock Sensor sends voltages back to the computer. The computer analyzes these voltages and determines if they meet a pattern that is equal to engine knock. If so, the computer reduces timing by as much as 5* to try and stop it. There are various flavors of Knock Sensors, typically the ones on newer model vehicles work both ways, if the computer does not detect knock, it advances timing slightly to try and increase performance. You will find a knock sensor on every vehicle sold today, and on most older cars, as long as they're equipped with an ECU.
the elictronic control sinsor at on a 93 mercury villager
can you tell me where the knock sensor is located on a 3.3l mercury villager
This is an image. (below)
It is under the intake manifold.
The knock sensor is under the intake manifold, which has to be removed. This should be left to an experienced mechanic.
1999 - 2002.
the knock sensor is under intake, must remove intake and it is under two coolant lines.
I payed $117.00 at auto zone
There's no need to replace knock sensors, and there was never a 3.6 engine.
the knock sensor monitors preignition,spark knock and sends signal to pcm,pcm responds by adjusting ignition timing and fuel timing until knock is gone.
It is under the intake manifold. Darn hard to get to and expensive to change.
donde esta colocado el knock sensor en una Chevy silverado 2000