Hi all: I,ve had a shop do a lot of chassis and A/C work on our 95 Mercury Mystique 2.5 l. During the recent 90 plus degree weather we've had, the A/C barely got down to 55 degrees at the dash outlets. Suction pressure was 50 plus psi running. It even cycled the compressor and high speed fan by means of the high pressure safety switch(new, also hoses, dryer, reduction valve new) After the hot spell passed, I got 83 psi at 73 degrees f ambient.before starting the system. Does it seem to y'all that there is too much R134a in the system? Book calls for 26 oz. After running the system on the road., it produces 37 degrees at the dash outlets, day temp in the mid 70s.. Do I need bnother trip to the shop, or is this OK? Thanks.