Is idle jitter a spark plug problem?

1 There is too much carbon deposit in the throttle, injector and air intake, which may be one or all of them. Mechanical failure of ignition coil, spark plug and fuel injector. , resulting in cylinder missing. 3 oil pressure or cylinder sag, resulting in insufficient power. 4. The fuel quality is unqualified. 5 Idle speed control valve is damaged or dirty. 6 Air leakage in the intake manifold. 7 engine arm or claw pad is damaged, etc. Shangmiansuo