Charging a discharged system on a 90q20v
Pulled vacuum on the system and bought 4 cans of R12 for a small fortune.
I put the first two in with the car running and AC on with a direct charging hose. It was still blowing warm so I looked up the specs and realized I needed 37 oz. of refridgerant. So I ordered 2 more cans (I had 2 initially), and this time I hooked up a r134a gauge manifold with a R12 -> R134a hose to hook the can up to the manifold.
I also noticed that with the red plug disconnected on the high side, the ac compressor did not run, so I ended up putting most of the third can in without the comrpessor running. I figured this out and disconnected the high side and hooked the red plug back up and the compressor started running again. But the compressor on this car runs weird, it kicks on every few seconds for a second or so. I could watch this on the low side guage. The pressure would read 20 psi, the compressor would kick in, you could see the clutch spin, and the pressure would climb to 50 psi over a few seconds, the the compressor would shut off and the clutch would stop spinning.
I finished putting the third can in (with only the low side connected from the manifold this time) and it started blowing cold/cool, but not as cold as I expected. I then punctured the fourth can, and started putting it in, but stopped after a few oz. because with the low side readings bouncing up and down as the clutch went in and out, I couldn't figure out how I was supposed to tell when I was done.
So here i am.
First of all, what's the PSI I should be charging to on this car? I can't find this information anywhere. Either high side, low side, or both preferably.
Second, now that it's blowing cool/cold-ish, it's only doing so out of the center vents. The side vents are blowing warm and it's highly annoying. Any idea why it's doing this? I rebuilt the heater box a few years ago with new foam -- maybe i covered up something I wasn't supposed to? the car has pretty much been sitting since then as i have R&Rs the engine and interior. Any quick way to diagnose this? Would really not like to take the dash apart again to get to the blower box.
Thanks!
Pulled vacuum on the system and bought 4 cans of R12 for a small fortune.
I put the first two in with the car running and AC on with a direct charging hose. It was still blowing warm so I looked up the specs and realized I needed 37 oz. of refridgerant. So I ordered 2 more cans (I had 2 initially), and this time I hooked up a r134a gauge manifold with a R12 -> R134a hose to hook the can up to the manifold.
I also noticed that with the red plug disconnected on the high side, the ac compressor did not run, so I ended up putting most of the third can in without the comrpessor running. I figured this out and disconnected the high side and hooked the red plug back up and the compressor started running again. But the compressor on this car runs weird, it kicks on every few seconds for a second or so. I could watch this on the low side guage. The pressure would read 20 psi, the compressor would kick in, you could see the clutch spin, and the pressure would climb to 50 psi over a few seconds, the the compressor would shut off and the clutch would stop spinning.
I finished putting the third can in (with only the low side connected from the manifold this time) and it started blowing cold/cool, but not as cold as I expected. I then punctured the fourth can, and started putting it in, but stopped after a few oz. because with the low side readings bouncing up and down as the clutch went in and out, I couldn't figure out how I was supposed to tell when I was done.
So here i am.
First of all, what's the PSI I should be charging to on this car? I can't find this information anywhere. Either high side, low side, or both preferably.
Second, now that it's blowing cool/cold-ish, it's only doing so out of the center vents. The side vents are blowing warm and it's highly annoying. Any idea why it's doing this? I rebuilt the heater box a few years ago with new foam -- maybe i covered up something I wasn't supposed to? the car has pretty much been sitting since then as i have R&Rs the engine and interior. Any quick way to diagnose this? Would really not like to take the dash apart again to get to the blower box.
Thanks!