Vanguard BIG BLOCK M540000, Руководство по ремонту, Страница: 65 / 168

Intake Elbow and Throttle Body Adapter - EFI
On engines equipped with a cyclonic air cleaner, an intake
elbow is fitted. Follow the removal steps for the intake elbow.
On engines equipped with a low-profile air cleaner, a throttle
body adapter is fitted. Follow the removal steps for the throttle
body adaptor.
Intake Elbow Removal
1. Remove the crankcase breather hose from the valve
cover to the intake elbow ( A , Figure 70).
70
2. Remove the fuel vent line from the fuel pump module to
the intake elbow ( B ).
3. Inspect hoses for cracks, tears and damage. Replace if
necessary.
4. Remove the 2 fasteners ( C ) that secure the intake elbow
to the throttle body assembly.
NOTE: Depending on your engine's trim, the intake elbow
may be secured to the throttle body by either 2 or 4 fasteners.
The removal procedure is the same regardless of the number
of intake elbow fasteners.
5. Lift the intake elbow off of the throttle body assembly and
set aside. Inspect the throttle body to intake elbow o-ring
for damage and contamination. Replace if necessary.
Throttle Body Adapter Removal
1. Remove the crankcase breather hose from the valve
cover to the throttle body adapter ( A , Figure 71).
71
2. Remove the fuel vent line from the fuel pump module to
the throttle body adapter ( B ).
3. The throttle body adapter is secured to the throttle body
by the 4 air cleaner base plate fasteners. Remove the 4
air cleaner base plate fasteners ( C ).
4. Remove the air cleaner base plate to support bracket
fasteners.
NOTE: Depending on your engine's trim, the air cleaner base
plate may be secured to a support bracket with either 2 or 4
fasteners.
5. If equipped, remove the 2 fasteners that secure the ECM/
Fuse Block mounting bracket to the throttle body adapter.
6. Lift the throttle body adapter and gaskets off of the
throttle body assembly and set aside. Discard old gasket.
Idle Air Control Valve (IAC) - EFI
1. Disconnect the IAC valve electrical connector ( A , Figure
72).
72
2. Remove the 2 fasteners ( B ) that secure the IAC valve to
the throttle body.
3. Remove the IAC valve from the throttle body and set
aside.
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