Precautions In Servicing; Fuel Injection System Components; General - TGB EST 1000 Service Manual

4-2. FUEL INJECTION SYSTEM

PRECAUTIONS IN SERVICING

When handling the Fuel Injection component parts or servicing the Fuel Injection system,
observe the following points for the safety of the system.

GENERAL

Be sure to relieve the fuel pressure while the engine is OFF.
Bending or twisting the control cables will impair smooth operation and could cause the cables
to stick or bind, resulting in loss of vehicle control.
Work in a well-ventilated area. Smoking or allowing flames or sparks in the work area or where
gasoline is stored can cause a fire or explosion.
FUEL SYSTEM
• Do not apply commercially available carburetor cleaners to the inside of the throttle bore,
which is coated with molybdenum.
• Do not snap the throttle valve from full open to full close after the throttle cable has been
removed. It may cause incorrect idle operation.
• Seal the cylinder head intake ports with tape or a clean cloth to keep dirt and debris from
entering the intake ports after the throttle body has been removed.
• Do not apply excessive force to the fuel pipe on the throttle body while removing or installing
the throttle body.
• Do not damage the throttle body. It may cause incorrect throttle and idle valve
synchronization.
• Prevent dirt and debris from entering the throttle bore, fuel tube and return tube, clean them
using compressed air.
• The throttle body is factory pre-set. Do not disassemble in a way other than shown in this
manual.
• Do not loosen or tighten the white painted bolts and screws of the throttle body. Loosening or
tightening them can cause throttle and idle valve synchronization failure.
• Do not push the fuel pump base under the fuel tank when the fuel tank is stored.
• Always replace the packing when the fuel pump is removed.
• Fuel injection system location, see page 8.
• A faulty EFI system is often related to poorly connected or corroded connectors. Check those
connections before proceeding.
• When disassembling the EFI parts, note the location of the O-rings. Replace them with new
ones upon reassembly.
• Before disconnecting the fuel hose, release the fuel pressure.
• Always replace the clamp when the fuel hose is removed or loosened.
• Use a diagnosis tool for EFI system inspection.
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