I have a 92 Toyota Pickup with the 22RE. The problem I have is when the truck is cold and the A/C is turned on, the truck idles up like it suppose to, but after running for a while it seems to randomly not idle up, even though the compressor is still engaged. I have tried adjusting the A/C amplifier and it seems to make no difference when its idled up or not. It doesn't change. I'm thinking the amplifier is my problem but wanted to ask before trying to locate one. If anybody has one, I would be interested in it. Thanks for any help!