Classic/Antique Car Repair: Sticky Throttle .., 1970 dodge challenger, dodge challenger

Question
Hello, I've recently started noticing on my 1970 Dodge Challenger (which I keep stored most of the year), that the throttle seems to be sticking a bit when I  start up the car. The normal idle is about 900 rpm (it's a 440 engine and 4-bbl carb), but lately it will sometimes run up to about 2000 rpms until I give the accelerator pedal at good tap one time to get it to slow down its idle.

It rarely does this after it's in use, but if the idle doesn't come down all the way to normal after I slow down or  stop at a light, I again tap the pedal and this "un-sticks" the throttle.

Is the fix as simple as spraying oil on the spring that holds the accelerator cable at the carb? Or does this sound like it will need a new throttle cable or ??

Thanks much for any advice on this!  

Answer
It sounds like it could be the fast idle cam on the side of the carburetor sticking. It is part of the choke linkage. I would get a can of carburetor and choke cleaner and spray down the linkage on the side of the carburetor. Do not use oil on these linkage pieces as oil will pick up dirt and make them stick worse. Try that and let me know.
Brad