I don't know where you can get a diagram but Ford has some recalls out on duel fuel tanks. Check with a dealer yours could be covered.
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.
VSV is a solenoid. Check at your Chevrolet or Isuesyou dealership.
A fuel system diagram for the 1989 Honda Civic would include the fuel pump, the fuel relay, and the fuel tank and lines. You can find the diagram in most Chilton's manuals for that model and year.
A fuel system diagram for a 1989 Volkswagen Diesel Jetta can be found in an automotive repair manual. Chilton is a company that makes repair manuals for most vehicles.
crutchfield.com
Ask your Dad. LOL
You can obtain a wiring diagram of your Mitsubishi 1.5 liter at most Mitsubishi dealerships. You can also find the wiring diagram and many auto-parts stores.
but a chilton manual for it.
color coded diagram for 1989 Harley FXR
A person can ask an auto part tech to print off a copy of the wiring diagram of a check control system in a car. A person can also find this diagram in the maintenance manual of this vehicle.
Haynes Auto manual from Auto Zone for about 20 bucks.Toyo joe
http://forums.nicoclub.com/zerothread/253879 has factory service manual