The temperature difference between the front and rear of the evaporator evaporator is small
R134A condensing pressure is normal 9bar (absolute pressure) around the evaporation pressure depends on the conditions, such as air conditioning conditions, should be 3.7-4.4bar (absolute pressure) around.
Evaporator before and after the temperature difference is small because the heat load is low. Under normal circumstances is the evaporator heat exchanger dirty, need to be cleaned.