2-16 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Throttle Body Cleaning
Check the throttle bore for cleanliness as follows.
Remove the throttle body assy (see Throttle Body Assy
Removal in the Fuel System (DFI) chapter).
Check the throttle valve [A] and the throttle bore [B] for
carbon deposits by opening the throttle valve.
If any carbon accumulates, wipe the carbon off the throt-
tle bore and the throttle valve, using a lint-free cloth pen-
etrated with a high flash-point solvent.
Fuel Hose Replacement
Remove the fuel tank (see Fuel Tank Removal in the Fuel
System (DFI) chapter).
Be sure to place a piece of cloth around each fuel hose
Wipe off the dirt of the surface [A] around the connection
using a cloth or a soft brush.
When removing with flat tip screwdriver
Insert the flat tip screwdriver [A] into slit on the joint lock
Turn the driver to disconnect the joint lock.
When removing with fingers
Open and push up [C] the joint lock with your fingers.
Prying or excessively widening the joint lock ends
for fuel hose removal will permanently deform the
joint lock, resulting in a loose or incomplete lock
that may allow fuel to leak and create the potential
for a fire explosion. To prevent fire or explosion
from a damaged joint lock, do not pry or excessively
widen the joint lock ends when removing the fuel
hose. The joint lock has a retaining edge that locks
around the housing.
Pull the fuel hose joint [A] out of the delivery pipe.
Fuel is flammable and explosive under certain con-
ditions and can cause severe burns. Be prepared
for fuel spillage; any spilled fuel must be completely
wiped up immediately. When the fuel hose is dis-
connected, fuel spills out from the hose and the
pipe. Cover the hose connection with a clean shop
towel to prevent fuel spillage.
Clean the delivery pipe.
Cover the delivery pipe with the vinyl bag to keep it clean.