What would make a 1984 Mazda B2000 not idle properly?
I have been working on one I just got and it wouldn’t idle after a tune up. I found a vacuum a large vacuum hose that comes off the under side of the air cleaner that goes to a vacuum pot. Off of that comes another one of the same size and goes to the base off the carburetor. It had come off and when I replaced it, it began to idle normally. You might try that and make sure all of your vacuum hoses are attached. A good tune up helps also (new plugs/wires/air cleaner, etc).