- If the engine sometimes stalls, try starting the engine and shaking the
volume air flow sensor harness. If the engine, as a result of shaking the
harness, stalls, incorrect or improper contact of the volume air flow sensor
connector is the probable cause.
- If, when the ignition switch is ON (but the engine is not
started), the volume air flow sensor output frequency is any value other than
zero, a malfunction of the sensor or of the ECM is the probable cause.
- If idling is possible even though the volume air flow sensor output frequency
is deviated from the standard value, the cause is usually a malfunction other
than of the volume air flow sensor. For example:
- The flow of air within the sensor is disturbed. (An air duct is disconnected
or the air cleaner element is clogged.)
- Incomplete combustion within a cylinder is happening. (Malfunction of
sparkplugs, ignition coil, injectors, compression pressure, etc.)
- Air is taken into the intake manifold through a leaking gasket, etc.
- There is an improper adhesion of the valve sheet on the EGR valve.