Throttle Body Assy
Be careful not to damage (dent, nick, flaw, and crack) the
flange mating surface and the plastic parts.
Do not drop the throttle body assy, especially on a hard
The throttle body assy should never be allowed to
fall. Throttle may become stuck, possibly causing
Stuff a piece of lint-free, clean cloth into the throttle body
assy, and the inlet ports of the cylinder heads to keep dirt
out of the engine.
If dirt or dust is allowed to pass through into the
throttle bore, the throttle may become stuck, possi-
bly causing an accident.
If dirt gets through into the engine, excessive en-
gine wear and possibly engine damage will occur.
Do not remove or adjust the throttle sensors [A] and sub
throttle valve actuator [B]. These parts are set at the fac-
tory and cannot be readjusted.
Adjustment of some parts could result in poor
performance, requiring replacement of the throttle
Throttle Body Assy and Intake manifold
Turn the throttle pulley [A] to check that the throttle valves
move smoothly and return by spring force.
If the throttle valves do not move smoothly, replace the
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
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FUEL SYSTEM (DFI) 3-115