Discussion Starter · #1 ·
Put a new compressor on my M3. Have also put on new expansion valve. Pulled a vacuum for 1 hour. Put 10 cans freon in. Didn't get cold. Dealer told me to check for leaks. Pressurized system with Nitrogen at 125 psi. left set for 1 Hour- didn't move. Pulled vacuum again and put in 4 cans- when adding freon the guage goes up to 40 psi but when can is empty - goes to negative. High side running 130 psi. after 5 cans(even at 10) I still have a negative pressure on suction side. I then took of hose and sure enough I still have a vacuum on the suction side.
And no cold air- if any one has any clue what could cause this I would really appreciate it.