Quote:
Originally Posted by netboy
My daughter's 1985 300d only blows about 80 at the vents with 134. Thayer gets 45 @ the vents and another guy I know with an 83 300d gets ice cold air with 134. And the fan blows very weak on high, I need to go thru the system. The components and refrigerant came with the car 2 years ago and it did blow colder then.
Low side press- 55...... High side press-400 @ 99 degrees ambient
With moderately cold air and weak fan air at the vents makes me believe the evaporator is dirty or clogged but what the deal with the pressures?
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Low side should be 30.
High side should be 250-280. (if the aux fan works)
400 - 600 is where you start blowing a factory NEW hose or seal..