Quote:
Originally Posted by Brian Carlton
62 is finally good data.
However, it's not satisfactory for cooling the vehicle. You've got to get it down to less than 50 if you have a prayer of decent cooling.
The issues can be low charge, insufficient airflow over the condenser (aux fan not working), or the evap temp switch is dumping the clutch much too early.
|
Also could be broken recirculate function. A 30 degree drop is typical of what you get when cooling outside air. Diagnosing requires removing the glovebox and using a handheld vacuum pump to evaluate the 7 vacuum lines to the various vacuum actuators. I'd be surprised if a '91 doesn't have some failed actuators.