I have a 1996 XJS with the AJ16 engine.
It’s been hot here in the DC area. Hot and humid. Over 90F (or 32C for the friends overseas) and I can’t get the air coming out of the vents to come out any colder than 70F (21C). Is that what this system can top out at?
The system seems charged. At idle, the low side is about 40psi. The compressor seems to run, but the high side stays at about 170psi. It never seems to click off, the clutch is spinning, and I believe it’s trying to cool…but it never gets cold.
When I get on the gas (in Park) the low side drops, but not the high side. That seems to stay constant…more or less.
I had this system vacuumed and recharged by a shop maybe two years ago? Frankly, the AC has never been great over the years I’ve owned it.
This morning, it’s 80F outside and the air coming out got down to 47F. So the system is working.