Dominick,
You said it takes 55oz of refrigerant. That seems high unless you have rear aux ac also. If you don't and you are overcharged you are probably hitting a max high pressure condition when engine rpms go up. When it hits the max pressure the compressor will switch off until the high pressure drops below a certain point. There is a high pressure and low pressure sensor in the system. It is not the wot condition as you said it is dropping out at lower throttle positions. And if it is too low on refrigerant it will switch on and off also. Does the compressor cycle frequently at idle? If so, that can indicate a low refrigerant condition.
Wags
"Pete, you could drop 2 tenths if you lose some weight"
2002 Rendezvous CXL (hers)
1968 Chevelle SS 396 convertible (not her's)
1967 Chevelle coupe (not her's either)
2002 Explorer Sport (not her's again)
2002 Audi TT 225 Quattro Turbo (was daughter's, now mine. Quick little bugger)
My 95 Chevy van had a similar problem. It was a vac leak in the mechanism that controls where the air comes out of. Similar to a revolver chamber.
Ok. According to the original post he said that the ac was "turning off" at higher rpms, but not at wot. I thought he had 2 separate issues going on (compressor switching off and blend door problem) One other thing, if it was completely down on refrigerant, don't expect it to stay full now. It's a sealed system and if it was empty, it had to leak from somewhere. Guess I don't speak "Domish".
Wags
"Pete, you could drop 2 tenths if you lose some weight"
2002 Rendezvous CXL (hers)
1968 Chevelle SS 396 convertible (not her's)
1967 Chevelle coupe (not her's either)
2002 Explorer Sport (not her's again)
2002 Audi TT 225 Quattro Turbo (was daughter's, now mine. Quick little bugger)
Ok, today it was not 100 outside and the A/C stayed on better. Plus, the engine temperature was a little lower. I am starting to think this was weather related, not an actual "issue", but again, I am uncertain.
I will check it the best I can soon with the carburetor cleaner trick. Even if I have to remove the dog house.
"Bye Bye, Johnny B. Goode."
It is possible that it is in the hose leading from the engine to under the dash. However it is more likely that it is likely in the dash, either in the control panel, the hoses or the vacuum motors.
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