According to the 1996 Mercury Grand Marquis Owner Guide : ( 20.0 U.S. gallons / 75.7 litres )
Is the big silver plate on top of the engine that reads 5.0.
On a 1992 Mercury Grand Marquis : The Mass Air Flow sensor should be between the engine air filter and the big engine air intake tube
On a 1999 Mercury Grand Marquis : The Mass Air Flow Sensor should be between the engine air filter and the big engine air intake tube
take a big rock and bust it out. than weld the new one in.
Right in the middle of all the pulleys. The one with the big fan on it is the water pump.
The Mercury Grand Marquis is a nice big car, especially those from 1986, very roomy for those who are tall, with long legs. The original tires size for this vehicle is 215/70-15. There is no other size suggestions for this vehicle.
Here's an idea, take it to a mechanic....dont install big things that need to be professionally installed for your own safety.
removable panel under the steering column, there's two big black screws that come out
It's a big deal, 'cause it's INSIDE the gas tank. Haffta drop the whole gas tank to get at it.
If it is a V8 it will be a 4.6L motor, it is niether it is a modular engine and they are not classified in the usual big block, small block engine sizes. It is just it.
in the fuse block. it should tell you on the fuse block which is which blinker fuses are usually big and have a metal covering.