Knock When Coasting
 

Hello, I have a 98 Civic DX 5 spd that has a knock when I am coasting.
It stops when I brake, or accelerate, or if I press in the clutch.
Does anybody have any Idea what this could be? I have heard it can be
the bearings, cv joints, or a warped rotor. The car also sorta rumbles
if I accelerate too much in 1st gear. Any help on this would be
really appreciated. Thanks in advance!