Spark Knock/Detonation

NOTE: Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

Check ignition timing adjustment. See IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT in ON-VEHICLE ADJUSTMENTS article.
Check ignition circuit.
Check camshaft position sensor circuit.
Check Mass Airflow (MAF) sensor circuit.
Check accelerator pedal position sensor circuit.
Check knock sensor circuit.
Check A/F sensor one.
Check fuel pump circuit.
Check fuel injector circuits.
Check IACV-AAC valve circuit.
Check IACV-FICD valve circuit.
Check EGRC-solenoid valve circuit.
Check EGR system.
Check main power supply and ground circuits.
Check Engine Coolant Temperature (ECT) sensor circuit.
Check heated oxygen sensor one circuit.
Check ECM.
Check air conditioner circuit.
Check fuel pressure regulator system.
Check EVAP system.
Check PCV system.
Check electric throttle control actuator.
Check fuel piping.
Check for poor fuel, heavy weight gasoline or low octane.
Check for air leakage from air duct.
Check electric throttle control actuator.
Check for air leakage from intake manifold, air collector and gasket.
Check cylinder head and cylinder head gasket.
Check timing chain and camshaft.
Check intake valve timing control, intake valve and exhaust valve.
Check exhaust manifold, tube, muffler, and gasket.
Check three way catalyst.
Check oil pan, oil strainer, oil pump, oil filter, oil gallery, and oil cooler.
Check oil level and condition.
Check radiator, hose and radiator filler cap.
Check thermostat, water pump and water gallery.
Check cooling fan.
Check coolant level and for contamination.
Check cylinder block, piston and piston ring.
Check connecting rod, bearing and crankshaft.
Check hydraulic lash adjuster.
Check cooling fan.