ok i have the guage hooked up car is on and AC on Max AC when i look at the gauge it doesn't move and i even let the car run for 10 minutes and the gauge still doesn't show any pressure and the crazy thing is that the car cools pretty good am i doing something wrong??

 

Must not be a good connection on the gauge.

 

what type of pressure gauges are you using?Is it hooked up to the high and low side ports?Why worry about it if theA/c is functioning.There are adapters for your Ports to push down on the shrader valves.R134a ports are designed differently than R12 .It may be exactly what PRO50SC said.