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The knocking noise is commonly called spark knock. The knock can be called by the engine timing not being set correctly, or using gas that has too low of an octane for the engine.
It is the alternator....
Most likely needs a tuneup done. Check the timing and change the normal tuneup part.
what kind of noise?
A knocking noise can occur from worn engine mounts. When the rubber insert on the engine mounts are old and brittle the chassis is not protected from the weight of the engine. Creating loud vibrations that get louder as the vehicle goes faster.
A little kid in the trunk with a hammer
it could be your valves or your engine
The most common cause is slipping belt
Bad ignition coil
knock sensor is going bad or is bad
Could be the CV joint is dry or has failed.
most likely the anti roll bar bushes. It was on mine