I have a 4 cyl. 1997 Sonoma truck. Air conditioner doesn't always blow cool air until you reve up the engine. This doesn't happen always but it seem to happen on the hottest Texas days. Any ideas?
your air con may need re gassing. I saw some in a walgreens once when I was in the states. Worth a try! phew Texas that's hot!!! Its wet and freezing here in the UK!