When I start up my truck in the morning it seems not to want to idle high at all(as if the choke isn't working) it sita around 800 rpm's and takes forever to warm up. However after you drive for about 10-15 mins when finally warmed up it'll idle at like 1200 rpms. This seems like much to high for a warmed engine, in fact this seems where it should be idleing when it is cold!!!! I think I read somewhere that idle is supposed to be around 750 rpms for a warmed up engine.

What should I look for on the choke....is it even possible for it to be working backwards?

Thanks for the help in advance!

Checking the choke is easy.... when you first start up the truck (engine cold), the choke plate should be in the closed position. Once the engine warms enough, it should begin to open and remain open. Most service manuals will give you a troubleshooting guide as to how you can check individual parts of the choke system (i.e. automatic choke system, choke opener, etc..)