To add refrigerant to your vehicle you must first locate the low side port to your ac system. There is a great web site www.idqusa.com that can help you locate the low side port on most vehicles along with helpfull information about a vehicle ac system.
R-134
i believe 2004
Depends on the size of the engine and what part you are using, but in most cases yes.
You can put Freon into your 1997 Nissan Pathfinder from the low pressure port. Connect the Freon bottle to the port. Release the Freon into the air conditioning system.
check your answer
Yes
Are you sure there is one? Ford products typiocally have one, but I am not aware of Nissan having one.
The 1998 Nissan Sentra GXE uses R-134a refrigerant for its air conditioning system. If you need to recharge the system, ensure you use the correct type of refrigerant, as older models may have used R-12, which is now phased out. Always check the vehicle's service manual for specific details and recommendations.
This information can be found in your owner's manual.
Which do i hook to to charge the freon in a 2004 ford expedition
R134a
R134a Refrigerant