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ENGINE MECHANICAL (X22SE 2.2L) 6A–13 Abnormal Combustion Condition Possible cause Correction Trouble in fuel injection system Fuel pressure control valve defective Replace Fuel filter clogged Replace Fuel pump clogged Clean or replace Fuel tank or fuel pipe clogged Clean or replace Fuel injector clogged Clean or replace Fuel pump relay defective Replace Power supply cable for fuel pump Reconnect, correct or replace Manifold Absolute Pressure Sensor Correct or replace Manifold Absolute Pressure Sensor Replace Engine Coolant Temperature (ECT) Correct or replace ECT Sensor defective Replace Throttle Position Sensor adjustment Reconnect Throttle Position Sensor defective Replace Throttle Position Sensor connector Reconnect Vehicle Speed Sensor cable loosely Correct or replace Vehicle Speed Sensor loosely fixed Fix tightly Vehicle Speed Sensor in wrong Replace Engine Control Module cable loosely Correct or replace Trouble in emission control system Heated Oxygen Sensor circuit open Correct or replace Heated Oxygen Sensor defective Replace Signal vacuum hose loosely fitted or Correct or replace Exhaust Gas Recirculation Valve Replace ECT Sensor circuit open or shorted Correct or replace ECT Sensor defective Replace Evaporator system Refer to Section 6E Trouble in ignition system ———— Refer to “Engine Lacks Power" Trouble in cylinder head parts Carbon deposits in combustion Remove carbon Carbon deposit on valve, valve seat Remove carbon |