AC Conversion to 134a problems

[Hoffbrohaus]

I'm really pissed at the moment. I did the whole big R134A conversion with PF condenser, new dryer, evap orings etc. Bought a Sanden 508 compressor of eBay. Then had to pay a place $750 to run custom ac lines to reach the new compressor, vacuum and charge the system. They called me and said I need a new compressor. "The pressures are all wrong".

So
1. Could this be possible, a cheap eBay Chinese Sanden 508 style compressor causing the problem? Because I don't want to buy another compressor and pay for a recharge if I don't have to.
2. At this point is it worth throwing more money into the AC or just screw it and only drive Fall through Spring (I live in Phoenix AZ)
3. Just get the car back, buy my own compressor and charge it myself somehow? (The shop wants another $818 to get a new compressor and recharge, parts & labor)

[roguetoaster]

So, no new expansion valve or evaporator? While it's possible the compressor is faulty (get a refund if so), it's more likely that there is some other issue if it's building pressure at all. Also $750 is pretty aggressive for new lines IMO and hooking the car up to their AC machine, so I always get suspicious when larger round numbers get tossed out.

[tomstin]

Getting the expansion valve and evaporator in and out is a bit fiddly and I can understand why a shop would avoid it. But I agree with the above post, both parts are critical to a R134 conversion. The expansion valve can cause pressures to be "all wrong".

Where I'm also suspicious with the pricing, you're in it this deep, and living in AZ, you need to get it sorted.