Yes, a person can get a diagram of the PCV valve location in a 1989-1999 Mercury Grand Marquis. This diagram would be located in the maintenance books found in auto part stores.
left side of dash
( 20 U.S. gallons )
at the junk yard
According to my Chilton's Auto Repair manual : For a 1989 Mercury Grand Marquis : With engine oil filter change : Both the 5.0 / 302 and the 5.8 / 351 take ( 5.0 U.S. quarts )
its on the passenger side front near the front tire
It is part of the power steering pump assembly.
I have a 1996 Grand Marquis. If one of the brake lights goes out the signal on that side flashes faster. I would check the brake/tail lamps.
Follow the Youtube instructions.
If you don't see it under the hood, then look under the car just in front of the rear wheel.
The starter solenoid is located (in a 1989 mercury grand marquis), as you raise the hood, on the left hand side of the engine compartment. Just behind the battery. (you should be standing right in front of the passenger side headlight.)
it is either you have a shor in your wiring or you have a loose connectoin or you need a new relay
On a 1989 Mercury Grand Marquis : The automatic transmission fluid level dipstick should be in the engine compartment , near the firewall ( the metal wall that divides the engine compartment from the passenger compartment ) just towards the passenger side of the vehicle ( where the rear of the engine connects to the transmission )
it's your headlight switch
About 150, up to 190 hp with an all-round tune-up.
My manual says fuel tank capacity is 19.0 gallons (71.9L).
( 20 U.S. gallons ) according to my Chilton's repair manual
pre-heat spark plug, if this works then replace it.
It may not have one but if it does of course it will be located somewhere inside the glove box.
Wiring Diagrams Ford Crown Victoria/Grand Marquis 1989-1998 from AutoZone DIY http://www.autozone.com/az/cds/en_us/0900823d/80/17/3d/a8/0900823d80173da8/repairInfoPages.htm
because heat core was removed?
removable panel under the steering column, there's two big black screws that come out
15 mpg city, 22 highway for a combined average of 18 mpg. (Data published by the EPA)