Location of knock senor on 97 maxima se

Your knock sensor is located Under the hood, center, front engine area, below intake manifold, mounted on block.


A defective knock sensor may cause engine detonation or reduced spark advance and fuel economy. When a knock sensor is removed and replaced, the sensor must be tightened to its specified torque. If the knock sensor is installed tighter than it should be, it may become too sensitive and provide an excessively high voltage signal, resulting in more spark ****** than required. When the knock sensor is installed looser than it should be, the knock sensor signal will be lower than normal, resulting in engine detonation.

To replace the knock sensor:

• Disconnect the knock sensor wiring connector.
• Then, unscrew the sensor.
• Remove the knock sensor.
• Reverse the procedures to install the part.

I believe this car takes premium gas. If you are using regular it will knock so try premium and while you at it, add a can of injector cleaner to clean off the injectors.

For the location of the knock sensor go to;
http://www.motorvate.ca/mvp.php/507

Here is something to try. While the engine is idleling, tap on the sensor and see if the engine starts to shake because the ecu is sensing "knocking".

Tip. When removing any screw/bolt, if it has a choice between a using a screwdriver or wrench, use the wrench.