Hello everyone. I'm new to the forum and have a problem with my ac. It works fine when I am sitting still. Blows out cold air and everything is good, but when I start driving it starts blowing warm air and the engine revs up and wont idle down unless I turn off the ac. Can someone give me some advice on what may cause this. Thanks in advance for any help on the situation.

 

What year?

 

sorry, its a 97 with 2.3 L

 

check engine light not on, fan works fine, the compressor stays engaged for a couple minutes then diengages.

 

On first impression, this SOUNDS like a pressure switch problem. It's like a nominal pressure is maintained while at idle, but a high pressure condition occurs when the compressor is spun at higher rpms.

Check the continuity of the A/C clutch cycling pressure switch and the A/C pressure switch.

Since the A/C compressor is cycling normally, you can rule out the A/C clutch control relay, diode, and field coil. These are the only things that connect to the PCM and control the A/C system.

 

i thought thats what the problem was too and recharged the system, but it didnt fix the problem. like i said though, it works great when im sitting still

 

Overcharged.

 

+1

 

thanks everyone for the help. it was overcharged. thanks again for the help.