No, not as standard.
mass air flow sensors are generally located in the air passage between the air filter and the intake manifold.
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.
under the intake manifold
Yes it did.
intake manifold
autozone.com
Intake manifold is leaking, or worse, cracked cylinder most likely tho, the intake manifold.
under the dash, driver side floor
the exhaust side is by the exhaust manifold,intake side is next to fuel injectors.
It is a small 'L' shaped hose that goes from the side if the water manifold to the bottom of the carburetor intake manifold. I believe it is part of the water supply to the carburetor manifold that heats it.
20 gallons , according to my Chilton book