Question about 2002 Nissan Quest

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Need to find location knock sensor for replace

My engine ligth is on check with computer code say has bad knock sensor I can not locate were is attached or I get the wrong part or I am looking on the wrong place of the engine

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I know that the knock sensor for a 1998 Quest with a 3.0 is located on the passenger side of the engine compartment under the intake manifold. You should be able to find the wiring and connector next to the intake manifold. To access the sensor, you have to remove the upper and lower intake manifold. The sensor is on the block between the heads. Hope this helps.

Posted on Oct 05, 2008

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Well the knock sensor is located under the lower intake manifold, between the two cylinder banks in the valley. It's about a 3 hour job for an experienced technician, but I have to ask why you want to replace it.

If you have a knock sensor code on any Nissan replacing the knock sensor will not fix it. The knock sensor detects unwanted engine vibrations,such as spark knock. So if you have a knock sensor code first check your spark plugs, are they ok? (if not replace them). Next Quest vans are known for clogging fuel injectors so I'd recommend running a can of sea foam injector cleaner or going to your local shop and having a professional injector cleaner run through your car.

If problems still persist after having good plugs and running an injector cleaner through, other things to look for would be intake leaks (vacuum leaks), bad mass airflow sensor or a jumped timing belt, which you will need an experienced Technician to check

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