Excessive detonation (The engine makes continuously sharp metallic knocks that change with throttle opening. Sounds like pop corn popping.) - Suzuki Jimny Workshop Manual

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Excessive detonation (The engine makes continuously sharp metallic knocks that change with throttle opening. Sounds like pop corn popping.)

Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M13A with VVT and Engine Basic Inspection:M13A with VVT .

Condition	Possible Cause	Action
Excessive detonation (The engine makes continuously sharp metallic knocks that change with throttle opening. Sounds like pop corn popping.)	Faulty spark plug	Spark Plug Inspection:M13A
	Loose connection of high-tension cord	High-Tension Cord Inspection:M13A
	Engine overheating	“Overheating” under Engine Symptom Diagnosis:M13A with VVT
	Clogged fuel filter (faulty fuel pump) or fuel lines	Fuel Injector Circuit Check:M13A with VVT or Fuel Pump and Its Circuit Check:M13A with VVT
	Air inhaling from intake manifold or throttle body gasket
	Malfunctioning EGR valve	EGR System Inspection (If Equipped):M13A
	Poor performance of knock sensor, ECT sensor or MAF sensor	DTC P0327 / P0328: Knock Sensor Circuit Low / High:M13A with VVT or Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor Inspection:M13A
	Faulty fuel injector(s)	Fuel Injector Circuit Check:M13A with VVT
	Faulty ECM
	Excessive combustion chamber deposits	Piston Pins and Connecting Rods Inspection:M13A
	Camshaft position control (VVT) system out of order	Oil Control Valve Inspection (For Engine with VVT):M13A