Posted by GLENN on September 30, 2001 at 05:03:18: via: or 192.152.140.9
76 CORVETTE AC WAS UP GRADED WITH 77 VETTE PARTS GOING FROM VIR TO EXP.TUBE.ALL NEW PARTS WITH EXCEPTION TO REMAN. COMPRESSOR.AFTER ASSEMBLY OF THE SYSTEM PULLED VACUUM AND STARTED CHARGING.AFTER 2 CANS OF REF.THE HEAD CAME UP TO AROUND 125,BUT THE SUCTION PRESSURE WAS AROUND 10 PSI.TO MAKE A LONG STORY SHORT,IT ACTED LIKE THE SYSTEM WAS STILL LOW SO I PUT THE THIRD CAN OF GAS IN AND THE HEAD CAME TO 175 BUT THE SUCTION WAS AROUND 30 PSI.I THEN ADDED THE FOURTH CAN OF GAS,THE HEAD CAME TO 250 BUT THE SUCTION WAS NOT EFECTED. WITH THE PRESSURE SWITCH IN THE CIRCUIT,AT IDLE THE AIR TEMP IS 53*WITH THE COMPRESSOR RUNNING,BUT WITH RPM'S OVER ABOUT 2500 THE SUCTION GOES LOW AND THE SWITCH OPENS,AND IT CONTINUES TO CYCLE ON/OFF.THOUGHT OIL MIGHT HAVE BEEN RESTRICTING ORIFFICE TUBE,PULLED TUBE,LOTS OF OIL IN LINE BUT DIDN'T SEE ANY PROBLEM.VACUUMED SYSTEM AFTER ASS.PUT IN 2 CANS OF GAS HEAD WAS 110 SUCTION WAS 0. NEED HELP!!!!!!!!!!!!! THANKS