Hey guys I just started having this problem the other day and Its driving me insane. To start I'm fairly sure this AC compressor came off a single cam and is on my B Series. So my AC goes on and off Randomly. I cannot control it from the button anymore This just started happening after I had a radiator problem. I checked the relays and the connection behind the climate control. The radiator blew somewhere unknown so I replaced it but after the AC keeps switching on and off randomly. When I'm in neutral the RPMs either fluctuate high then normal again or they plunged under like the car wants to stall then back up. If I turn the AC off while neutral the car will die! Any suggestions?

 

Bleed the cooling system. Then go from there.