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Recently, when I take video with my P80, it makes a knocking noise on the recording, so much that other sound is drowned out! It sounds like the auto focus at work, but shouldn't it br off for video?
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Knock Sensor contains no moving parts and can not make any noise. It only detects noise in the engine block to allow the engine control computer to make adjustments as needed.
Is that a 720 computer model or a 720 mechanical (Record)? If it's mechanical, it might need a good cleaning and oiling to start if that hasn't been done in a while.
No it isnt a knock sensor the knock sensor job is to detect a knock noise and ****** timing. The knock that it is looking for is from octane or fuel or pinging that creates N0X s. A pollution gas. The knocking noise that you are hearing is different. If it is a multiple noise ar a rattling sound that will be the valves. There are other noises like a piston knock this knock is a sharp metallic noise, If the knock occurs only on acceleration that noise is a crankshaft noise. You need to check you oil level and make sure it is corrects. Look at the oil condition do you see silverish or whitish condition,is the oil deep black.
If the oil has been changed, why are you putting more oil into the engine? Does the engine use/burn oil, or have an oil leak? If you have none of these problems, then you may be overfilling the engine which is just as bad as no oil.
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