Throttle Body Assy
Remove the delivery joint and injectors (see Injector sec-
tion in this chapter).
Open the butterfly valves [A], and wipe any carbon off
the throttle bores [B] around the valves, using a piece of
lint-free cloth penetrated with a high-flash point solvent.
Clean the bores [C] of the inlet manifold [D] as well.
Blow away dirt or dust from the throttle body and the inlet
manifold by applying compressed air.
Do not immerse the throttle body (or throttle assy)
in a high-flash point solvent for cleaning.
could damage the throttle sensor on the throttle
Before assembly, visually inspect the mating surfaces [A]
for any damage, like dent, nick, rust, flaw, and crack.
Nick or rust damage can sometimes be repaired by using
emery paper (first No. 200, then 400) to remove sharp
edges or raised areas.
If the damage is not repairable, replace the throttle body
and/or the inlet manifold to prevent leakage.
With a high-flash point solvent, clean off the mating sur-
faces and wipe dry.
Be sure to install the dowel pins [B].
Fit the new gasket [C] into the groove. Be careful not to
pinch the gasket between the mating surfaces.
Tighten the flange bolts evenly.
Torque - Throttle Body Flange Bolts: 4.9 N·m (0.50 kgf·m,
Turn the throttle pulley [A] to check that the throttle valves
[B] move smoothly and return by spring force.
If the throttle valves do not move smoothly, replace the
FUEL SYSTEM (DFI) 3-99