I put a vac on the car holding a vac but my car still won't take the freon I bypass the relay the clutch engaged but still didn't receive the freon
Are you sure you have vacuum on both high and low sides, cause this sounds like a bad Schrader valve to me.
Yes I replaced the expansion valve and the drier also the compresser put a vac for an hour let it set for 30 minutes no leaks know my question is I closed both knobs on the manifold turned off my vac pump and let it sit for 30 minutes is that correct
Yes that is correct, then next you bleed in some liquid 134a into the high side about 1 lb. engine off, then charge the rest through the low side side with engine running. That is if your charging using the cold charge system. If your using a heated recharger you refill through the high side engine off until the measured amount is installed into the system. I would disconnect the low charge port and push in on the Schrader valve to see if it drops vacuum, if it does then there must be something with the charging unit, if it is measuring vacuum is should dispense 134a. HTH
I think I have a bad air compressor because I bypassed the sensor in the clutch kicks in but Freon will not go in to the system so I think that pump is probably out defected compressor
Forget about the freon right now, is the compressor making any pressure in the system high or low when you have it running?
Then there has to be something wrong with the charging unit, are you sure the valve is open on tank? What kind of charging set are you using?
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