The older the car, the heavier the oil needs to be. Your car calls for at least 30 weight oil when it's new. I'd use straight 30 weight (SAE-30) only.
According to the 1999 Mercury Grand Marquis Owner Guide : It is NOT a flex fuel engine ( use " regular " unleaded gasoline , 87 octane )
A 2002 Ford CrownVictoria and Lincoln Towncar
hinge hood merqury gran marquis 1978
Yes you can.
Anywhere from 4.5 L to 5.0 Liters.
On a 1999 Mercury Grand Marquis : It has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils One coil for each of the eight spark plugs firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
why does my airbag light blink off and on on my 92 mercury gran marquis ls
According to the 2003 Mercury Grand Marquis Owner Guide : The fuel tank capacity is ( 19.0 U.S. gallons )
Th firing order for a 1993 Gran Marquis with a 2.5 v6 engine is1-4-2-5-3-6. The number one cylinder is the front on the drivers side.
it should say on the ires itself or in the door jam or in the owners manual
Best I can tell you is that it is electronic. Check at your local Ford parts dept. They should be able to help you.
Check for fuel and spark - noting the age of the vehicle it may be the timing chain has "jumped"