Cracking sound and smoke puffing from my 2016 Suzuki Swift

You could be looking at any number of causes for this, and some of them herald the demise of your engine. Get a mechanic to check the car out. They will probably do a compression test, a leak-down test and have a close listen to the engine both at idle and under load.

If the cracking sound is a backfire or misfire, you may have an ignition problem. But the smoke is a bit more involved as it depends on the colour of the smoke. Black smoke suggests poor fuelling, but blue or grey smoke often means internal engine wear.