When i pulled out of school today i noticed my 4runner(86, 22-rte turbo) had no power, and then when i stopped about 10 minutes later smoke started to pour out of the engine compartment and out of the exhaust. I shut it off and opened the hood, nothing visibly wrong, so i turned it back on and smoke immediately started to pour out of the number 4 cylinder and out of the exhaust. Help!!!! What is causing this? Is my engine SOL or what. Someone please help me out.