Ok just got done doing my motor swap I had left the ac hooked up and just push it down to remove the motor we dummy me did not change out the bracket from the old motor to the new jdm one. So I had to removed the old feon and remove the compressor to replace the bracket I pulled vac and it held for like and hour and I recharged the system but the psi is all over the place and no cold air the compressor is hit or miss I. Running I have jump the compressor to see and still not even a change in vent temp it working before the swap you think it my be the expansion valve that is stopped up... I want to fix this myself and not have to keep taking my ac jobs to my buddy for fixing I have a gage set and a vac pump and can get the feon recovered by my buddy for free. The system have been converted to 134 before I did the swap
AC help please 1993 runner
- Thread starter Harleydoc
- Start date
Register to hide this ad
Well just pulled the high side line and low side line to try and flush the TX valve no Luck tried to blow some air in her no luck tried the flush and let is sear for an hour no luck so I guess the box is coming out wish me luck one more thing the TX valves for a 94 to 95 are for 134a should I get one of them or get and 93 on that is for r12 they look them same???
2ndGen4runner4x4
New member
Unless you have a bunch of R12 laying around, get the 134a set-up and go with that.
Well just Got done fixing the ac on this beast. Here is what I did the TX valve was stuck closed try to back flush. That did not work. Pulled the box out last night and tried to work the valve with some hot and cold cycles still did not open all the way. I went today and got a new TX valve for a 94 4runner this is a r134a valve the 93 is for r12 and I was converting it to 134 so after look and the side by side they look the same. Got home flushed the whole system I used 5 can of the ac flush put a can in at a time and purged the system with clean dry compressor air for about 15 each can the last can I put in I purged the system for 45 mins. Then after that install a new dryer put in a half of can of pag oil in the dryer and the other half in the compressor and low side line and a bit in the high side lines and put the box back together then pulled vac for and hour to insure the system was good and clean of moisture. After the vac cycle let it sit for 30min to insure the vac hold with it did. The I charger her up and now she will blow 60 to 62 sitting in the drive way at idle. Took it for a test drive and had to turn it down. The PO has already converted it to 134 before I got it and it did have a new compressor on it and the part number was a 134 ac system so I left the compressor I her some people say to change them or at the very least the front seal and flush the system. The first few can of flush. Flushed out some Nasty crap but after that is was all nice and clean. Hope it will last a long time after all this work. With was really not a lot of work just took a lot of time to insure she was done right.
