i fixd my ac but i dont no how much freeon it should have does anyone no thanks

 

Pick up on of the little pressure gauges and fill it until you're in the right area for fullness.

 

a 91 civic does not use R134 unless you retrofitted it...otherwise R12 will be needed to fill it....i would leave this to someone that knows what theyre doing..you could get seriously hurt...

 

whatever the capacity of r12 is multiply by .85 for r134a lbs. youll need to replace the dryer bottle, get the retrofit high/low fittings just to charge the system. plan on recharging it once a year or so since the r134 molecule are smaller they will leak out of the r12 hoses and fittings.