Fellow just stopped by Railroad with an '89 GMC truck. His A/C is configured identical to DeLorean, including accumulator AFTER evaporator. I guess it does accumulate gas (was dripping with condensation). Why? Has already been metered and boiled. His low pressure switch was on side of accumulator like 3 conductor DeLo, but only two lines. Still plan to experiment with that one at lunch. Old Ford A/C is all suction driven. Compressor INPUT is heart of system. Rather than orifice tube, which appears to respond to high side pressure, uses a "throttle suctioning valve" which responds to low side (is located after evaporator). Actual pressure change occurs at an expansion valve, but it just closes, not meters. JZD was an old GM man, but he didn't personally design car... Oh, this fellow also had problem losing refrigeration cycle in traffic (engine mounted fan), so he added an electric fan in front of condensor. Is tied to compresor clutch line. Odd, but works. Not applicable to DeLorean I know, but anyone converting a different marque in their stable might consider same. Bill Robertson #5939