Air conditioner problems

When I rebuilt my 2001 Rodeo LS, the a/c line got disconnected by accident and 134a was released. After the rebuild was complete, my brother pulled a vacumm on the system @ 27lbs. Then 4oz of oil was added and three cans of 12oz 134a. At the time it did fine, however on a warmer day the compressor only comes on once every 15 min. if I am lucky. I put an A/C guage on the system and it is within normally operating range, and it doesnt' need any more 134a.

Any help would be great.
Brian.

Maybe a bad compressor?

Or a kink in the lines to the accident?

hmm, it isn't possible that there would be a kink.