Lack of fuel: One possibility is that your car's fuel system is not providing enough fuel to the engine. This could be due to a malfunctioning fuel pump, clogged injectors, or a faulty fuel pressure regulator.
Air leakage: Another possibility is that there is an air leak in your car's intake manifold or vacuum hoses. This would cause too much air to be mixed with the fuel, resulting in a lean air-fuel mixture and sputtering.
Spark plugs: Worn or faulty spark plugs can prevent your engine from getting the spark it needs to burn the fuel properly.
Idle air control valve: The idle air control valve (IACV) controls the amount of air that flows into the engine at idle. If it is malfunctioning, it can cause the engine to sputter.
Exhaust manifold leak: A leak in the exhaust manifold can cause air to enter the exhaust system and disrupt the combustion process, leading to sputtering.
To pinpoint the exact cause of the sputtering, it's best to take your car to a qualified mechanic for diagnosis and repair.
