Grand Vitara & XL-7

Check for faulty Idle Air Control (IAC) system.
Check for faulty Engine Coolant Temperature (ECT) sensor.
Check for faulty Mass Airflow (MAF) sensor.
Check for low engine compression.
Check for faulty hydraulic valve lash adjuster(s).
Check for leaking valve seat.
Check for sticky valve stem.
Check for weak or damaged valve springs.
Check for blown cylinder head gasket.
Check for sticking or damaged piston ring.
Check for worn piston, ring or cylinder.
Check for malfunctioning PCV valve.