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There is something serious wrong, take it back!
check the u-joints in the drive shaft first
belt
hey man i got a 2000 mercury cougar v6 it is makeing a tapping noise under my manifold, and i dont know what that could be. but it sounds like you might be haveing the same problem im haveing. suggestion: try checking where that tapping noise was again, it might be under your manifold!.
noise, clash, clank, bang, jangle
I have the same problem some times. I found the air filter box vibrating, which was causing the noise. I am looking for the answer to that one.
Bad Tire or wheel bearing, rotate the tires to the front if the noise follows its the tire if remains in rear its the wheel bearing
I had a very loud humming noise coming from my 99' cougar. I talked to many mechanics and nobody knew what it was. I looked it up online and found two sources( listed at bottom) that said it was the idle air control valve. I replaced the part and my car runs great without the horrible loud noise.;
Could be your CV Joint or tie rod
this is an easy fix. the problem is the iacv. just ask for that part at dealer change it out and the problem is fix.
if reservoir was empty, the system need bleeding before noise will go away. if that doesnt work the pump was damaged already before you refilled with fluid, replace pump