This document discusses several older air conditioning suction control systems used by Chrysler, GM, and Ford from the 1960s through the early 1980s. The Chrysler system used from 1961-1982 maintained a low side pressure of 22-31 psi. GM's pilot operated absolute suction throttling system from 1966-1979 kept an evaporator pressure of 28-32 psi. Ford employed a suction throttle valve system from 1972-1981 and a combo valve that both maintained a low side pressure of 28-32 psi and were used from the 1970s through mid-1980s. GM also utilized a valve in receiver system from 1973-1979 that operated at 28-32 psi low side pressure.

1. SUCTION CONTROLSUCTION CONTROL
SYSTEMSSYSTEMS
OLD TECHNOLOGY!!!!!!!!OLD TECHNOLOGY!!!!!!!!

2. CHRYSLER (ETR/EPR) SYS.CHRYSLER (ETR/EPR) SYS.
• USED FROM 1961-1982 (OLD STUFF)
• SUCTION CONTROL
• LOW SIDE PRESS: 22-31 PSI
• AUX. SERVICE PORT: 0-19 PSI

4. GM (POA) SYSTEMGM (POA) SYSTEM
• PILOT OPERATED ABSOLUTE
SUCTION THROTTLING
• 1966-1979
• EVAP PRESS. 28-32 PSI

6. FORD (STV) VALVE SYSTEMFORD (STV) VALVE SYSTEM
• 1972-1981
• LOW SIDE 28-32 PSI
• ACCUMULATOR AND TXV?

8. FORD COMBOFORD COMBO
VALVEVALVE
• USED HOW LONG?:1970’s-mid1980’s
• LOW SIDE 28-32 PSI

10. GM (VIR) SYSTEMGM (VIR) SYSTEM
• USED: 1973-1979
• VIR: VALVE IN RECIEVER
• LOW SIDE: 28-32 PSI

13. • HAD ENOUGH OF THAT STUFF?