|
The factory a/c in these trucks CAN be made to work quite well, the expansion valve is actually a better metering device than an orifice. Poor performance w/R134 at idle is common. You need LOTS of airflow thru condensor, 4 core rad, seal all around the rad to force all air thru rad/cond. GOOD fan clutch w/7 blade fan or go w/dual electric. If you really want cold, use R12, but it is very costly. Another thing to check is a cruddy evaporator, I have seen them collect leaves, pine needles, then fungus grows etc. restricting airflow thru the evap. I have worked on mobile a/c for nearly 20 years, I have seen a lot. Brian
|