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02 Texas Yukon. Warm air coming out of vents Compressor running five seconds then off over and over. New Pressure switch installed still cycling on and off. One 20oz.can of A/C Pro Still warm air. Condenser is clean. Compressor bad? Worked great last summer. Tried holding rpm's at 1500-2000 made no difference. No leaks.
The new recharge cans like A/C Pro have a gauge that works pretty good.
Which one you getting? Oem?
Not really sure got side tracked with this fuel filter thread. You cannot believe the problems I had last week with getting my fuel to stop draining so I could replace my fuel filter. Tried everything I could think of decided that running the tank really low had to stop the fuel we will see tomorrow.
Just for the hell of it--did you remove the fuel pump fuse? Also maybe crack the engine compartment shrader valve to bleed off the pressure.
Yep Fuel Pump Relay. Not a pressure issue it's a rare flow issue coming out of the tank that even on ramps would not stop fuel from running not dripping out of the fuel tank line going into the filter.
I wonder if that would have something to do with venting. Like if the gas cap was no good it could let air rush past the seal and air gets into the tank helping to push the gas out--gas flowing through the line continuously. Just a theory. Plausible?
Vacuum and fill by weight is the best / correct method. If you’re still operating weak, or cycling more than it should, running with high and low gauges while filling works reasonably well, but you’re likely to be off pretty bad. Filling the low side while it’s running with a single gauge is better than blindly filling, when I’ve done it I ballpark on the lower end of guesstimated operating pressure for temp, because you’re more at risk for overfilling. If the system is running and you’re under 25psi I think it’s reasonable to add more, but if it’s hot hot you could want up to 55, but filling at the top end of pressures, adding more gives diminishing returns on pressure, that’s when compressors turn into grenades.
Just the Low Line Pressure. It shows the Low line pressure when the compressor cycles on and the pressure when it cycles off. You can see the difference as you charge up the system. I have a bad compressor and I will be buying a set of gauges and a new compressor.
