I have a 2000 Frontier with a 4 cyl engine. I've searched the stickeys for this topic and it appears as if other members avoid the knock sensor at all costs. The Haynes manual doesnt describe 4 cyl knock sensor removal and youtube doesn't give much information for the 4 cyl. Well, i'm past avoiding changing the sensor. I have removed the current sensor. My problem now is trying to install the new one.
The video i had found on youtube described removing the alternator and the oil filter (which I had done, but didnt give me as much access as i had hoped or needed). A thread i found discussing the topic on a sentra relayed reaching it from under the car. That doesn't seem to be an option with the frontier. So it looks like i'll have to remove the throttle body. During my searching on this site someone also said the plenum must be removed. Does it need to be removed? If its removed, do the fuel lines need to be deprssured or anything like that? To me it appears as if either the plenum or the throttle body could possibly be removed to allow access to the knock sensor.
Has anyone performed this task on a 4cyl that could give advice as to how they've done it and also what they recommend be removed? Thank you for your help!
Also, what is that sensor bolted directly over the knock sensor access. Is it related to fuel or air?
The video i had found on youtube described removing the alternator and the oil filter (which I had done, but didnt give me as much access as i had hoped or needed). A thread i found discussing the topic on a sentra relayed reaching it from under the car. That doesn't seem to be an option with the frontier. So it looks like i'll have to remove the throttle body. During my searching on this site someone also said the plenum must be removed. Does it need to be removed? If its removed, do the fuel lines need to be deprssured or anything like that? To me it appears as if either the plenum or the throttle body could possibly be removed to allow access to the knock sensor.
Has anyone performed this task on a 4cyl that could give advice as to how they've done it and also what they recommend be removed? Thank you for your help!
Also, what is that sensor bolted directly over the knock sensor access. Is it related to fuel or air?
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