Emission Control System On-Vehicle Inspection

Increase the engine speed to at least 3,500 rpm.

Use a sound scope to check for injector operating noise.

Check that the operating sounds stop momentarily and then resume when the throttle lever is released.

HINT:

Measure with the A/C OFF.

Fuel return rpm:

1,400 rpm

Visually check that the hoses, connections and gaskets have no cracks, leaks or damage.

NOTICE:

1. Detachment or other problems with the engine oil dipstick, filler cap, ventilation hose and other components may cause the engine to run improperly.
   
2. Air suction caused by disconnections, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause engine failure or engine malfunctions.
   

Close port C, apply compressed air to port A and check that air flows out from port B.
If the result is not as specified, replace the fuel suction plate sub-assembly.

Close port C, apply compressed air to port B and check that air flows out from port A.
If the result is not as specified, replace the fuel suction plate sub-assembly.

Apply compressed air to port B and check that air flows out from port A and port C.
If the result is not as specified, replace the fuel suction plate sub-assembly.

Close ports A and C, and apply compressed air to port B to check for leaks.
If the result is not as specified, replace the fuel suction plate sub-assembly.