If parked and stepped on accelerator it makes a knock sound. If driving and accelerate it makes like a humming growl tick knock.
Dec 12, 2018 at 10:19 PM
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STRAILER
CAR REPAIR CONTRIBUTOR
54,189 POSTS
Is it a single knock or continuous? Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response.