When the engine is running, the air intake valve is lifting up.
If the valve does not operate properly, check the air intake solenoid valve hoses for leak.
If there are no leaks, check the air intake solenoid valve.

Air Intake Solenoid Valve Unit TestTire Wear, Damage
As the tire tread wears down, the tire
becomes more susceptible to puncture
and failure. An accepted estimate is
that 90% of all tire failures occur during
the last 10% of tread life (90% worn).
So it is false economy and unsafe to
use the tires until they are bald
In accordance with the ...
Multifunction Meter
A. Multifunction Display
Odometer
Trip Meters
Current Mileage
Average Mileage
Fuel consumption
Stop Watch
B. Speedometer
C. Gear Position Indicator
D. Power Mode Indicator
E. S-KTRC Mode Indicator
F. Warning Symbols
G. Lap Counter/Coolant /
Intake Air Temperature
Meter
...
Radiator Inspection
Remove the radiator (see Radiator and Radiator Fan Removal).
Check the radiator core.
If there are obstructions to air flow, remove them.
If the corrugated fins [A] are deformed, carefully
straighten them.
If the air passages of the radiator core are blocked more
than 20% by unremovable ...