You can find the low side on the a/c compressor or on the low side suction hose...........
The 1998 Plymouth Grand Voyager low pressure port can be found on the top of the air conditioner compressor. The low pressure port should be labeled as such.
Under the dash on the driver side.
The 1997 Plymouth Voyager low pressure valve is located on the bottom of the air conditioner compressor. The low pressure valve has a hose connected to it.
Under the hood, along the driver side inner fender panel.
It is the larger of the two, closest to the front of the vehicle the smaller one is closer to the firewall or interior of the vehicle
Having just charged a 1993 Sundance, it is located on the compressor itself. Look on the top right of the compressor toward the engine center for the bike tire like fitting.
you can buy a port on eBay
Plymouth is a port city in England.
Into the low side service port.
I am assuming you are talking about the A/C. From the compressor, locate the large black hose comming from the A/C compressor. It goes into a small hard line, the valve on this hard line is the low side service port. The hose the comes from the A/C condencer is the high side service port.
leaded gas, plug wire off,clogged catlytic converter,dumping raw gas out of exhaust port.
The obd 1 port is next to the battery