A loud clank noise when starting your 1999 Mercury Cougar could be caused by several issues, such as a failing starter motor, a loose or damaged flywheel, or issues with the engine mounts. The starter may not engage properly, leading to a clanking sound as it tries to catch the flywheel. Additionally, worn or broken components within the engine or transmission could also contribute to the noise. It's advisable to have a mechanic inspect the vehicle to diagnose the specific cause.
Needs a new starter
belt
check the u-joints in the drive shaft first
There is something serious wrong, take it back!
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.;
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.
A loud humming noise from a 1997 Mercury Cougar XR7 with a 4.6-liter engine could be caused by several issues. Common culprits include a failing or worn-out wheel bearing, which can produce a humming sound that increases with speed, or a problem with the alternator or other engine accessories. Additionally, issues with the transmission or differential could also create a humming noise while driving. It's advisable to have the vehicle inspected by a mechanic to accurately diagnose and address the issue.
Could be your CV Joint or tie rod