According to one of Fords websites :
For a 1994 Mercury Villager , 3.0 liter V6 :
The radiator cap is ( 13 PSI )
under the hood
30 - 35 PSI with the engine running.
Should be in a removable housing at the engine end of the upper radiator hose
A Villager is not equipped with any kind of GPS device.
The 1994 Mercury Villager has a 3.0 litre V6 engine from the factory : ( it has 6 engine cylinders )
You'll need to install a tee into the line by the fuel filter to check it, there is no shrader valve.
No, it is not an interference engine.
According to one of Fords websites : For the 3.0 litre V6 engine in a 1994 Mercury Villager : ( the spark plugs are gapped at .032 inch )
On the EGR valve assembly.
The 3.0 litre V6 engine in a 1994 Mercury Villager has a timing BELT
Pull off the vacuum hose. If there is any gas present in the hose, it's faulty.