Hey, This is Charlie, have used just ask before to fix tv. I'm going to have a series of auto air questions related to my f-150 1997 4.6.
The system is still cooling, it wold say about eight years ago had the whole system replaced by an ac repair shop. I'm original owner.
about six months ago the clutch started eng/dis engaging and I didn't do anything until now. I replaced the high side switch, seemed to help for a day. I bought a manifold meter set, I believe the low side was ok, and the high side was high. I ended up completely recharging the system with 2 Lbs of coolant
, pressures were fine after charge 40 on low 200 on high. within a day i'm seeing the low side with the meter reading pegged (highest pressure reading.
When I recharged the system i held the cans upside down which have since learned let fluid into system rather than gas.
I've bought a new compressor just because the clutch/compressor is making quite a bit of noise, I assume due to the eng/dis issue over last six months.
I thought about checking the orifice tube, not sure of its exact location. coolant seems clean, not black/dark. I wanted to hold off replacing the compressor until I return home next week (working in SC, home in FL).
So will probably have questions over the next week.