i have tested my a/c and its right were it needs to be i get cold air out of my rear ducts but its not that cold and my front ducts i get no cold air at all the compressor pump kicks on and off like it should any ideas why im not getting cold air

could be a plugged orfice tube going to the front a/c unit.

this is the deal the reason i had no a/c is becuase when i was reconnectiong one of my batteries my scocket wrench arched on one of my a/c lines and burned a hole in it i fixed the line and recharged the system my gauge that i bought reads good i have the right level of r134a in there and still no a/c the compressor works i think it kick on and off before this all happened my a/c worked fine dose this make sense to anyone why dont i have a/c now that the problem is fixed did i do something wrong or forget to do something thanks for the time

my gauge that i bought reads good i have the right level of r134a in there

How much refrigerant did you dump in? There is a weight amount printed around the evaporator that will indicate correct charge amount. Too little or too much will BOTH reduce cooling. Cycling compressor is not the most accurate way of telling if you are properly charged or not. Hot days, your compressor may not cycle at all, just stay on. All sorts of flukey things come into play with mobile a/c systems. Engine speed, air flow, refrigerant charge, if you ate toast or corn flakes that morning, yadda yadda yadda.

Start with how much is in there right now. Go from there.

how do i find out how much is in there when i put the gauge on it shows it at a acceptable level

Did you use 12 oz cans, or a big 30lb can? Count up your 12oz cans (if that's what you used) and that will give you the amount in weight that you put in.

Mere pressure alone is not the way to determine if the charge is correct or not. Refrigerant pressure changes with temperature. If you put a gauge on a refrigerant can, it will read a certain pressure, regardless of the size of the can. Translate that over to your system, it may be in the "green line" on your auto parts store gauge, but there are other factors involved. You have to have enough refrigerant to keep your evaporator at it's proper level of refrigerant to remove heat. Not enough will not remove as much heat. Too much drives up the low side pressure and will not cool as well, plus risking damage to slug of liquid refrigerant taking out your compressor.

I worked on a guy's home a/c system last year. The system needed ONLY 6 lbs of refrigerant to run properly. It was not cooling at all. It was a warm day, the pressures looked a little high, but not too bad. After removing almost 11 lbs of refrigerant from his system, it began cooling again. (The system had 17 lbs in it) The pressures didn't look too far off, but there were other factors that come into play, like superheat etc, etc. Long story on that.

Moral of the story the same. Weigh in the charge is best method on automotive system, because they are more whacky than their stationary A/C system counterparts.

i gave up its in the shop right now thanks for the time and anwsers

well my truck was in the shop for 4 buiness day and they told me it was my evaporator coil so they replaced it for $ 1000 hope i didnt get ripped off but anyways ive had it back for 3 days now and my a/c isnt working again the canister is hot when i first got it back it was cold to the touch i am clueless what is wrong now hopefully its a warranty issue any body have any ideas i really dont want to take it back there i use my truck for work and was screwed while it was in there is there anything i can check before i take it back again

Replaced the evaporator, eh? $1000, ekk.

Okay, here's what I don't understand here. If before, you had cold air out the rear a/c, but not out of the front, then that tells me that there was refrigerant in the system (to some level) and what working too some degree.

Replacement of the evaporator, that would have to be for a leak in the evaporator itself, or at least you hope.

*Sounds* now there is a leak in the system. If there is any pressure left in the system, I would look around the evaporator's fittings, and the "canister" (accumulator) and see if you have any leaks with a soapy water solution. (only works if there is any pressure left in the system) If that is the case, then they owe you a fix. Sounds like they do anyway.

I would question them about the evaporator replacment and ask them why they did it. I would like to hear their answer.

If your rear is working and your front isn't I would suspect orifice. I'm sorry but I think you got way ripped off, the evaporator coil has no moving parts and nothing to go wrong except getting a leak in it. You can't have a leak or your rear wouldn't work.

its going back to the shop on monday thanks for the replys ill post what happens