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
Fuel pressure out of specification
Faulty TP sensor, ECT sensor or MAP sensor
Faulty injector
Faulty ECM
Malfunctioning EGR valve (if equipped)
High idle speed
Condition “Improper engine idling or engine fails to idle”
Low compression
Poor valve seating
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
Improper tire pressure