Probably computer controlled and not adjustable
10 degrees advance
Just taking a guess........Loose chain.
Yes, they are identical
For a 1991 Ford Crown Victoria : " regular " unleaded , 87 octane
In the gas tank.
4
ignition problem
Were are the timing marks on a 1991 acura legend
Yes, both model years are AOD transmissions.
wich engine do you have?
8 degrees
According to my Chilton's book : For a 1991 Ford Crown Victoria ( 5.0 / 302 and 5.8 / 351 ) With engine oil filter change ( 5.0 U.S. quarts )