misfiring and smoke from the engine

[davidhey]

my titan is misfiring and there is smoke coming out of my engine

help

[mithoon]

Check all spark plug one or more must not be working.

If spark plug, plug wires and ignition coil is fine then something big inside engine is gone wrong like piston ring is weak and burning oil for smoke.

Or check Air filter and Air flow meter is malfunctioning running rich fuel which make missing and smoke.