Is there any information you can give on adjusting the carburetor on a 1986 Corolla?

Those carburetors are controlled with about 5 electronic sensors. About the only thing adjustable on them is the idle set screw. You probably can still get a rebuild kit for them, and you will also need to get a repair manual, or go to the Library as you will find technical details needed when checking the condition of the sensors. If any of the sensors check out bad, you won't be able to replace them. You will be stuck with either getting another carburetor from the salvage yard, and rebuilding it, or you will have to get a rebuilt one for about $400.00.