According to a website I was looking at :
For a 1987 Mercury Cougar , 3.8 liter V6 , 4 speed automatic transmission
( 17 city / 24 highway , miles per U.S. gallon )
right frame rail near fuel tank.
If this car is fuel injected, it is located behind the passenger kick panel. If it is not fuel injected, it does not have one.
On a 1999 Mercury Cougar : The ELECTRIC fuel pump is INSIDE the fuel tank It is installed through an access hole in the top of the fuel tank
In the fuel tank
Yes
its in the fuel tank repair about 700.00
Inside the fuel tank
The primary cause for jerking on a 99 Mercury Cougar is the engine not getting enough fuel. This can be a sign of a clogged fuel filter, bad fuel pump, or clogged fuel injectors.
The fuel pump on a mercury cougar is in the fuel tank. You are going to have to remove the fuel tank, take the lock ring off of the tank, and then pull the pump assembly out.
relay R1 is for the fuel pump on a 1999 Mercury Cougar
According to the 1999 Mercury Cougar Owner Guide : ( 58.5 litres / 15.4 U.S. gallons )
it in your gas tank if its fuel injected