One problem related to engine funny noise has been reported for the 1999 Mercury Cougar. The most recently reported issues are listed below.
When starting the car it's making a grinding noise. Finally, took vehicle in and it was the flywheel and starter. Dealer fixed it. Had the vehicle for two weeks after repairs, and it still didn't start. When turning the ignition key, it would either make a humming sound or nothing at all. Dealer kept it for 3 weeks and put over 100 miles on the vehicle, and still can't find what is wrong.