The timing must be checked using a timing light. Most mechanics have one.
You use a timing light to check the marks on the timing chain/belt.
check your air idle control valve
Use a 1999 grand marquis gs key!!
Check the ignition coil on the Marquis. Check the crank sensor as well. One of these is probably bad.
diagram a\c system 1999 grand marquis online
According to the 1999 Mercury Grand Marquis Owner Guide : ( 71.9 liters / 19.0 U.S. gallons )
Yes.
Timing CHAIN on the 2.5 liter V6 in a 1999 Suzuki Grand Vitara
( 5 quarts with filter change ) according to the 1999 Mercury Grand Marquis owners manual
will 22 fit on my 1999 grand marquis or do i need to add a lift kit fit the rims
On a 1999 Mercury Grand Marquis : In the passenger compartment fuse panel : ( # 16 is a yellow color 20 amp fuse for the cigarette lighter )
According to the 1999 Mercury Grand Marquis Owner Guide : # 16 is a ( 20 amp fuse ) for the cigarette lighter