They threw it out when the put in the fuel injection system. Fuel injected vehicles don't use accelerator pumps.
I couldn't find one in the fuse layout page of the manual that came with my 1987 Grand Marquis. I would assume not.
no
18 MPG.
The factory radio on a 1987 Mercury Grand Marquis is made to play local radio states and cassette tapes. It is connected to a high fidelity sound system.
Clarify....Are you talking about an AMP for a Stereo?
According to my Chilton's Auto Repair manual : A ( 1987 ) Mercury Grand Marquis has a ( 20 U.S. gallon gas tank )
autozone.com
NO a grill from a 87 will not fit a 91. Only a grill from 88 , 89 or a 90 will fit. They don't even look the same.
under the dash, driver side floor
mass air flow sensors are generally located in the air passage between the air filter and the intake manifold.
At the St. Thomas Assembly Plant (STAP) in Ontario, Canada
20 gallons , according to my Chilton book