What is the problem when the engine keeps missing on a 96 tercel could it be the plugs or fuel injectors?

First if u you can get engine to run long enough, get a spray bottle with water and apply light mist around coils and wires. At night time you should see small electrical sparks around area if there is bad part, also see if engine stalls or gets worse, if not, shut off engine and check wiring harness connections. If that doesn't help, remove coils in top on engine, one coil supplies spark for 2 adjacent cylinders, check for cracks in coils, bad wires or loose connectors, maybe even breaks in spark plug wires. Check for water or rust down on spark plug holes. Likely your just over due for changing the spark plugs, always use new plugs from your Toyota dealer. I that doesn't cure problem, try putting some fuel line antifreeze in next time you fuel up, also try a different supplier. Can also check air filter to see if its plugged. also can replace fuel filter, basic maintence goes a long way. Not scare you but by now if the problem isn't cured there may be an injector or internal engine problem, bring it to your favoite mechanic to check it out... First if u you can get engine to run long enough, get a spray bottle with water and apply light mist around coils and wires. At night time you should see small electrical sparks around area if there is bad part, also see if engine stalls or gets worse, if not, shut off engine and check wiring harness connections. If that doesn't help, remove coils in top on engine, one coil supplies spark for 2 adjacent cylinders, check for cracks in coils, bad wires or loose connectors, maybe even breaks in spark plug wires. Check for water or rust down on spark plug holes. Likely your just over due for changing the spark plugs, always use new plugs from your Toyota dealer. I that doesn't cure problem, try putting some fuel line antifreeze in next time you fuel up, also try a different supplier. Can also check air filter to see if its plugged. also can replace fuel filter, basic maintence goes a long way. Not scare you but by now if the problem isn't cured there may be an injector or internal engine problem, bring it to your favoite mechanic to check it out... First if u you can get engine to run long enough, get a spray bottle with water and apply light mist around coils and wires. At night time you should see small electrical sparks around area if there is bad part, also see if engine stalls or gets worse, if not, shut off engine and check wiring harness connections. If that doesn't help, remove coils in top on engine, one coil supplies spark for 2 adjacent cylinders, check for cracks in coils, bad wires or loose connectors, maybe even breaks in spark plug wires. Check for water or rust down on spark plug holes. Likely your just over due for changing the spark plugs, always use new plugs from your Toyota dealer. I that doesn't cure problem, try putting some fuel line antifreeze in next time you fuel up, also try a different supplier. Can also check air filter to see if its plugged. also can replace fuel filter, basic maintence goes a long way. Not scare you but by now if the problem isn't cured there may be an injector or internal engine problem, bring it to your favoite mechanic to check it out...