For a 1991 Mercury Grand Marquis : " regular " unleaded gasoline , 87 octane is used for both the 5.0 and 5.8
the fuse box on a 1991 ford grand marquis is located right under the steering wheel
Why cant you put any 5.0 engine in your 1991 mercury grand marquis
It's in the tank.
its in the trunk
Try adjusting the modulator valve
Heater core leaking.
As far as I know , the 1991 Mercury Grand Marquis either had the 5.0 litre / 302 cubic inch V8 or the 5.8 litre / 351 cubic inch V8 engine . The 4.6 litre Single Over Head Cam ( SOHC ) engine was used in the Mercury Grand Marquis starting with the 1992 model year Firing order of the 5.0L which is the engine installed in the 1991 Mercury Grand Marquis is 1-5-4-2-6-3-7-8 rotor turns counterclockwise.
If your Mercury Grand Marquis is a 1991 model or older . The 5.0 liter / 302 and the 5.8 liter / 351 has the distributor at the front of the engine The distributor rotor turns COUNTERCLOCKWISE
Need fuse box diagram for 1991 Mercury capri
No,they won't fit.
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
Who told you that you cannot install any 5.0? Of course you can with the proper modifications.
For a 1991 MGM the clock fuse is #8 lgt. blue 15 AMP
according to Autozone, under the driver's side, in front of the rear weelwell, mounted on the chassis in the fuel line.
sorry that's a aod transmission they don't have modulators.the shift is controled by the kickdown cable
It should be 1 3 7 2 6 5 4 8 (That's the most common) - But I am not 100% sure.
According to my Chilton's Auto Repair Manual : For a 1991 Mercury Grand Marquis : Both the 5.0 liter / 302 and the 5.8 liter / 351 take : 4.0 U.S. quarts without filter 5.0 quarts with engine oil filter change
I assume it would be ( 5W-30 ) like my 1991 5.0 liter V8 Ford Mustang had from the factory
This transmission is not electronic, its is operated via a throttle valve control cable running from the throttle body to the transmission bell crank.
I would assume it came from the factory with ( 5W-30 ) like my 1991 , 5.0 litre V8 Ford Mustang did
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.
I would asume it came from the factory with ( 5W-30 ) like my 1991 Ford Mustang 5.0 liter V8 engine did
it gets 15 mpg's in city.....22 on Highway