Besides that, the knock sensor is really an important sensor for getting the maximum power and fuel economy out of your engine. There may be a hidden trap door for fuel pump located under carpet in rear cargo area. But if you follow them down to the bottom of the car you will see that they are not really hard to get to. It also listens for engine run on which happens when the vehicle is turned off, but tries to keep running until it stalls. When you suddenly depress throttle the cruise advance drops from 40 to 15 then quickly rises to 20-24 depending on rpm and whether a downshift occurs. Thanks Again And Keep Up The Great Gearhead Approach Of Working On Your Own Vehicle.
If the knock sensor is malfunctioning, this can lead to both poor fuel efficiency and major engine damage if not replaced immediately. With a little bit of diligence and patients I think it is really possible. I know the manual says you can use 87 octane fuel, but my 97 Interceptor knocked like crazy the first time I put 8 … 7 octane in it. It is held on with two small screws. Although 10 different knock sensor codes can set from P0325 through P0334 the most common code you'll find is the P0328.
Testing the Knock Sensor before Replacing It Maybe it's not a failed knock sensor? You can get a screwdriver and tap on the block and look for changes in the voltage to verify that the knock sensor is working properly. You should see a reading of about 12 volts indicating a good ground. I have the same problem with my Pathfinder and plan on relocating the sensor as shown above but want to make sure it won't be done in vain. Here are two close-ups of the wire coming out of the harness on the sensor. The Nissan Pathfinder Knock Sensor ensures your vehicle's operating at its highest level of performance for the lowest amount of gasoline.
So, begin your diagnosis by visually inspecting the sensor and its connection. It allows the engine to run with the ignition timing advanced as far as possible. Position the new sensor on the engine block and insert the retaining bolt through the center, threading it into the engine block. Material may not be copied or reprinted without written permission. If great gas mileage and long lasting performance are imperative for your regular commute, vehicle owners go with cars engineered by Nissan. Even back then, the relocation was pretty well established as a cheap fix for the problem.
There is only 1 wire coming out of the loom after the last injector. A 32 valve engine is marginal on torque until 2,500-3,000 rpm why downshifts occur. Inside, the knock sensor is a piezoelectric crystal. As stated, the only thing that is not really clear in the video is the arrangement of the knock sensor wiring - one is a traditional copper wire with insulation around it, and the other is silver wire, un-insulated, and wrapped around the insulation of the other wire and then both are inside a black rubber sleeve inside the harness. Changing the design and how the circuit operates doesn't seem like a good idea to me. Which code was it throwing? It may be helpful to you. We consider this a difficult repair even for experienced technicians.
This relieves fuel pressure from the line so you don't get squirted in the eye with gasoline when you remove the hose clamps. I typically notice it at a lighter cruise. For more information, go to www. The worst case might be 25-45 mph and again around 55 mph pulling a slight incline. I have a '98 Nissan Pathfinder that runs well, except the check engine light has been turning on and off for the last three months or so.
Surprisingly even the four-cylinder repair procedure isn't that easy, because of the buried location of the part. The knock sensor contains a piezoelectric element which generates a voltage when it becomes deformed. Nevertheless, access is limited in this location. You could probably do it with a cheaper sensor, but getting the correct harness is very important. The sensor in a Nissan plays a passive role, so the engine may run fine without it functioning, but it will throw a code.
This guy made a great how-to video on YouTube that I used to know what to do. Code P0325 pertains to the sensor on bank 1 the side of the engine where the 1 cylinder is located. On my 1996, you almost have to stand on your head to see the resistor. When changing, first pull the fuel pump fuse then run the engine until it dies. I just reprogramend my keyless entry on my 1995 pathfinder, the module was located under the driveride seat The fuel filter for a 1996 Pathfinder is located above the rear axle on the bottom of the body. For example, t … he manual calls for the timimg belt to be replaced at 120,000 miles if memory serves so you may as well tackle that also.
At that point the computer retards the ignition timing just enough for the pinging to stop. Make sure you push the connector in enough for the locking tab to engage. Start the engine and allow it to run for several minutes. It is about halfway back and is a circular part with a bolt running through the center and an electrical connector on the outer edge. Test the theory by applying pressure to the outside of the hatch back lock. Edited December 17, 2012 by ltsnotme Which code was it throwing? Crank the engine, put the vehicle in gear and keep your foot on the brake. Replacing this same knock sensor part on the 3 L and 3.
Came away with three deep cuts and a lot of my blood remaining on the top of the engine. It's worse in hot ambient temperatures too. So in short just let it be. By monitoring your car's timing, the Nissan Pathfinder Knock Sensor makes sure of optimal performance for all circumstances. Heath Major symptom was lack of acceleration. Ok heres the 411 on it.