Hich is the high and low side to add freon in a 1992 ford ranger 6 cylinder

If your system is blowing warm I would recommend having the system evacuated and check for leaks. Just adding Freon will not give you ice cold A/C. There are two valves, low side and high side. Usually the plastic caps are blue for low side, red cap for high side. If you use a commercial A/C machine to service the vehicle, both valves are connected to check pressures in the system and also to fill the system with the correct amount of Freon. The low side (blue) is located at the firewall near the dryer and the high side (red) is usually on the passenger side near the radiator.

If we are talking about a pressure switch, it usually is the low pressure cut-off switch. Before messing with this switch, verify what your Freon pressure is.
If the pressure is low, the low pressure switch may be fine and you need to add Freon and find out why the Freon escaped.
If you have high pressure, there is a second switch which cuts power to the compressor. Too much Freon will activate this switch.
Tip: You have both a high and low pressure switch. The proper amount of Freon will center the pressure and keep the compressor running more consistently.
Either pressure switch unscrews from the fitting and with a minimum of pressure can be removed from the lines and replaced. The housing should have shapes for wrenches.

You have the right port if it fits the RECHARGE hose. If it's reading 130 psi, it might be way overcharged.
Did you follow directions and did the AC compressor clutch kick in? At that pressure,on the low side,the compressor shouldn't even engage.
To discharge the system if overcharged,you need for a shop to do it. don-ohio (:^)

Was the a/c compressor running when you got this reading?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Adding freon to a car requires connecting the low-side service valve first, followed by the high side, recovering the existing freon, evacuating the system of air and recharging the system with new freon.
You can use R-134a refrigerant for 1998 Ford Explorer. You can get all parts necessary for Ford Explorer at one place at http://www.carpartswarehouse.com/carparts/Ford/A-C_Condenser.html

The spark plug firing order is ( 1 - 4 - 2 - 5 - 3 - 6 ) The distributor rotor turns CLOCKWISE ( 1 - 4 - 2 - 5 - 3 - 6 ) The marked # 1 position on the distributor cap faces towards the firewall and slightly towards the passenger side The engine cylinders / spark plugs are numbered : passenger side of engine , front to rear , 1 , 2 , 3 and drivers side of engine , front to rear , 4 , 5 , 6

freon is added to the low pressure side. The adaptor will only fit this connection, the high pressure connection is a larger connector. You shouldn't just add freon without checking the high pressure side - you can still overpressurize the system, and this will cause your compressor to kick-off on high pressure.

It depends on the size of the cans!

The low side is the "thick" pipe that comes straight out of the inside radiator (evaporator) to the compressor, the high side is the thin pipe, running from the compressor to the outside radiator (condensor), then the liquid receiver (the part that looks like a soda can) Add a can of freon while the car is running with a/c on, check the sight glass on the liquid receiver the whole time. If there is enough freon in the system the sight glass should look almost full. If it's not enough, add another can.

Your focus should not take freon. Freon is used in older cars from 1995 on back. Your focus should take R134 and the plug for your AC should be located under the passenger side wheel well (yes ford makes things so convenient). Just unscrew the little plastic crews in you wheel well and attach the gauge and can of R134 (should take a little more than 2 large cans).

LEAN CODE PO171 PO174 ON 2003 FORD E350 5.4 L ENGINE WHAT TO DO