Fuel Injector Audible Inspection

NOTE

• Be sure the battery is fully charged.
• The secondary fuel injectors are operating with following conditions.

1. The engine speed is more than 6 000 r/min (rpm).

2. The throttle opening is more than 12В°.

• Remove: Fuel Tank (see Fuel Tank Removal) Primary Fuel Hose (see Fuel Hose Replacement in the Periodic Maintenance chapter)
• Connect the following parts temporarily.

Fuel Pump Lead Connector [A] Extension Tube [B]

Special Tool - Extension Tube: 57001-1578

• Start the engine, and let it idle.
• Apply the tip of a screwdriver [A] to the fuel injector. Put the grip end onto your ear, and listen whether the fuel injector is clicking or not.

Primary Fuel Injector [B] Secondary Fuel Injector [C]

A sound scope can also be used.

The click interval becomes shorter as the engine speed rises.

• Do the same for the other fuel injectors.

If all the fuel injectors click at a regular intervals, the fuel injectors are normal.

• Turn the ignition switch to OFF.

If any fuel injector does not click, check the fuel injector resistance (see Fuel Injector Resistance Inspection).