Air conditioner only blows cold air when idlling
Go to a shop. Pay for an estimate.
On cars I know, the engine has to be running to
turn over the AC compressor. So this would be
normal.
I could be wrong, but I think that the OP was trying to tell us that the flow of cold air stops when she accelerates.
Perhaps the compressor clutch is acting wonky?
Have you tried using the recirculate button? Wondering if massive influx of hot air is overwhelming the system.