My a/c is not blowing very cold air, something is definitely wrong, i already replaced the a/c gas like 2 years ago. What can be wrong? the evaporator? and it only blows cold air if my foot is pressing down the gas pedal, if not then it wont blow cold air

 

Low on Freon again.

Make sure the system has Dye in it and have it checked for leaks.
Maybe Evaperator or maybe compressor.

If it doesn't have dye in the system have it recharged with dye and wait till it leaks out again and have it checked.

 

k thanks