1A
Poor gasoline mileage
Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M13A without VVT and Engine Basic Inspection:M13A without VVT .
Condition Possible Cause Action
Poor gasoline mileage
Faulty ignition coil
Ignition Coil Assembly (Including ignitor) Inspection:M13A
Fuel pressure out of specification
Fuel Pressure Check:M13A without VVT
Faulty TP sensor, ECT sensor or MAP sensor
Throttle Position (TP) Sensor On-Vehicle Inspection:M13A , Engine Coolant Temperature (ECT) Sensor Inspection:M13A or Manifold Absolute Pressure (MAP) Sensor Inspection:M13A
Faulty injector
Fuel Injector Circuit Check:M13A without VVT
Faulty ECM
Inspection of ECM and Its Circuits:M13A without VVT
Malfunctioning EGR valve (if equipped)
EGR Valve Inspection:M13A
High idle speed
Condition “Improper engine idling or engine fails to idle”
Low compression
Compression Check:M13A
Poor valve seating
Valves and Valve Guides Inspection:M13A
Dragging brakes
Condition “Dragging brakes” in Brakes Symptom Diagnosis
Slipping clutch
Condition “Slipping clutch” in Clutch System Symptom Diagnosis:M13A Model
Thermostat out of order
Thermostat Inspection:M13A
Improper tire pressure
Tires Description