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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.

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Q: What does the knock sensor control on a 1999 Mercury Villager?
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Location of knock sensor on a 99 Mercury Villager?

It is under the intake manifold.


How do you change a knock sensor on a 1999 mercury villager?

The knock sensor is under the intake manifold, which has to be removed. This should be left to an experienced mechanic.


What years inner change with a 2000 mercury villager knock sensor?

1999 - 2002.


Where is the knock sensor located in the 1999 Mercury Villager?

the knock sensor is under intake, must remove intake and it is under two coolant lines.


What are some Prices for a knock sensor on a 1999 mercury villager?

I payed $117.00 at auto zone


How do you replace a knock sensor on a mercury villager estate 3.6 engine?

There's no need to replace knock sensors, and there was never a 3.6 engine.


What is the function of a knock sensor on a 2000 mercury villager?

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.


Where is the location of knock sensor on 2001 Mercury Villager?

It is under the intake manifold. Darn hard to get to and expensive to change.


Donde esta colocado el knock sensor de la mercury villager 2000?

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