Kuzen

So when the sun is out my car idles around 400 in drive and then when I turn on the AC it jumps up to 700 but at night the car idles perfectly at 700 in drive. Does anyone know what the cause is? Pcv valve?

teaa

not really a helpful reply but my car idles around 400 in drive with the AC off also. My AC compressor is locked up so I don't use it now but when it was working it would bring the RPMs up to 700/800. curious to see a fix for the low rpms