There is nothing wrong with the AC, it's just that I haven't used the car like in a week (I've been laid off from my job - now I'm a free man

) and I am planing to have a 1000 mi trip. The other day the car stalled on me and I started to check the major things to make sure my trip will be safe and comfortable. I guess I need to run a jug of Techron for the fuel system (i haven't done it in a long time) I checked the fuel pressure too and it looks ok - 45 psi and 50 psi when I unplugged the vacuum hose from the FPR. I didn't get any codes therefore I assume it was just some ugly stuff from the bottom of the gas tank.
Today I checked the refrigerant pressure with the engine on and the AC at max - everything it's ok there too. I didn't know how I was supposed to check it to get the correct readings.
Thank you for all the replies, you guys are cool and this is the greatest forum.
If you think there is something else I should check before hitting the road, I'm open to any suggestions.
BTW, I checked the fuel pressure at the connection right before the first injector (driver side). Is that the right way of measuring the pressure?
There is another connection close to the FPR with a green cap. What is that for?