phatz_hatz
Member
Have a 95 TBI Tahoe, noticing ac works great at idle and under light load, once i get on it a bit the ac cuts out than blows warm. I have the coolant valve/bypass valve bypassed with a ball valve and a vacuum line off the top of the intake manifold. I’m either assuming the top of the manifold is losing vacuum and making the bypass valve open and flooding the heater core with hot coolant or the compressor is disengaging. It’s an OBD1 scan port so it’s the old fashioned one that populates errors on the dash, don’t think it’s anything to do with the PCM. Do have 33s on it so it does use full throttle i feel to get up there when getting on it at highway speeds. Any thoughts would be appreciated
