mopar2ya

A while back my A/C just blew ambient, then while driving it just started working again. The truck sat for a week or so then today its back to ambient. The compressor is running but I have zero pressure on the low side, the high side has pressure. When I shut the truck off the low side very slowly builds pressure to around 50+ psi. Once I start the truck it goes instantly to zero. The system Freon is full. Does this sound like a orifice tube? BTW, this is a 2006 Hemi truck.

thanks,

Fordzilla

Yes...Or some other restriction in the high side...Drain, check or replace orifice tube...Flush the system (this also removes some compressor oil, so add the appropriate amount), refill and check for leaks......Ben

mopar2ya

UPDATE..... just took truck to get an orifice tube. A/C is nice and cold on my way to Auto Zone. Call a priest? I have an orifice tube handy. Might as well swap it out and see whats up. I know 2 years ago I put some stop leak in it before I did the evaporator. Wonder if thats gumming stuff up?