1greyawdtsi
10+ Year Contributor
- 80
- 10
- Sep 18, 2009
-
Seattle,
Washington
I recently relocated from Seattle WA to Charleston SC. Unlike Seattle
I know there is heat/humidity in the South. So I recently started to diagnose why the AC is not working.
Backstory: last December I swapped in a low mileage 4g63t (50k-ish) from a 97 Spyder GS-T into my ‘95 TSi. During the swap I disconnected the AC compressor and believe I left the entire AC system intact, unopened & swapped in engine, reinstalled existing ‘95 compressor.
Currently the AC switch illuminates - so I rented a loaner AC manifold gauge set. Initially the psi readings were pretty low. So far I have added a 12.3oz can of R134a with UV dye. I could hear the compressor kick on while adding refrigerant. I also looked with a UV light and can’t find any leaks. However after adding refrigerant the car still blows what feels like the outside air temps with zero cooling.
Now with the gauges correctly attached, open & the car running, AC and fan on high, idling - I’m getting a the low side reading that would fluctuate or cycle between 50/55-60ish psi and the high side staying steady at about 90-ish psi (see pic). It seems like the compressor kicks on and off fairly rapidly.
I’m reading a ton of threads but wondered if anyone has had any experience with a similar scenario & what the most logical & cost effective steps - I should take next? Thanks for reading and any suggestions.
I know there is heat/humidity in the South. So I recently started to diagnose why the AC is not working.
Backstory: last December I swapped in a low mileage 4g63t (50k-ish) from a 97 Spyder GS-T into my ‘95 TSi. During the swap I disconnected the AC compressor and believe I left the entire AC system intact, unopened & swapped in engine, reinstalled existing ‘95 compressor.
Currently the AC switch illuminates - so I rented a loaner AC manifold gauge set. Initially the psi readings were pretty low. So far I have added a 12.3oz can of R134a with UV dye. I could hear the compressor kick on while adding refrigerant. I also looked with a UV light and can’t find any leaks. However after adding refrigerant the car still blows what feels like the outside air temps with zero cooling.
Now with the gauges correctly attached, open & the car running, AC and fan on high, idling - I’m getting a the low side reading that would fluctuate or cycle between 50/55-60ish psi and the high side staying steady at about 90-ish psi (see pic). It seems like the compressor kicks on and off fairly rapidly.
I’m reading a ton of threads but wondered if anyone has had any experience with a similar scenario & what the most logical & cost effective steps - I should take next? Thanks for reading and any suggestions.
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