[jwlael]

The relief valve is going off at like 40 psi on the low side. The pressure will go up like its building up. The ac blows very cold. I had it at the shop and they had gauges on the high side and it was fine too. They ran it at idle for a long time and it never went off, its only when you start driving the truck that you'll get the sound of the relief valve letting freon out. The Ac system has never been replaced or messed with, when I took it to the shop they replaced the orifice tube on it. Could the compressor cause this even though its working? I find it strange that the ac works yet its kicking out freon when you drive it.

Another thing is im not sure (im not a super mechanic) but it looks to me the condenser is built into the radiator? I cant tell.