Go to your local auto parts store and they sell kits for $ 25-40 w/ gauge and directions included. I picked mine up @ Kragens.
The 1993 Ford Ranger air conditioning charge valve can be found on the top of the air conditioning compressor. The charge valve will be marked as the low pressure valve.
£49.95
It depends on the company. However, any air conditioning company will charge double if you let them look at your air conditioning at short notice.
Blue port. If you have the rear air then the charge will be greater than front air only.
Find the tag it will tell you there.
You may need to charge your a/c with coolant.
There is a leak somewhere in the air conditioning system. Mechanic shops have a special dye they can add to the system to find the leak.
Low refrigerant charge?
25-30 psi
where is low side charge port located
To properly charge the air conditioner you need gauges and a refrigeraant recovery system.
Buy a kit at Wal-Mart or auto parts comes with instructions