PleasureCraft Engine Group 5.0L, Руководство по диагностике

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3A - 8 Fuel Metering System 5.0/5.7L
MEFI 4 - PCM
Throttle Body Assembly
The throttle body assembly repair procedures cover
component replacement with the unit on the vessel.
However, throttle body replacement requires that the
complete unit be removed from the engine.
Clean
Important
•
Do not soak the throttle body in cold immersion type
cleaner. The throttle valves have a factory applied
sealing compound (DAG material is applied to outside
edge of each valve and throttle bore) to prevent air
bypass at closed throttle. Strong solvents or brushing
will remove the material. To clean the throttle body
following disassembly, use a spray type cleaner such
as GM X66-A or GM 1052626. Use a shop towel to
remove heavy deposits.
Notice: The TP sensor and the IAC valve are electrical
components and should NOT come in contact with solvent
or cleaner as they may be damaged.
Remove or Disconnect
1. Negative battery cable.
2. Flame arrestor.
3. Electrical connectors from TP sensor and IAC valve.
4. Throttle cable.
5. Throttle body attaching bolts.
6. Throttle body assembly and fl ange gasket.
•
Discard gasket.
Clean
Notice: Use care in cleaning old gasket material from
machined aluminum surfaces as sharp tools may damage
sealing surfaces.
•
Gasket sealing surfaces.
Install or Connect
1. Throttle body assembly with new fl ange gasket.
2. Throttle body attaching bolts. Torque to 15 N•m (11
lb.ft.).
3. Throttle cable to throttle body.
4. Electrical connectors to TP sensor and IAC valve.
5. Flame arrestor.
6. Negative battery cable.
Inspect
•
With the engine “OFF,” check to see that the throttle
lever is free.
– Move the throttle lever to wide open throttle and
release.
Reset IAC valve pintle position:
•
Move throttle lever slightly.
•
Start and run engine for 5 seconds.
•
Turn ignition “OFF” for 10 seconds.
•
Restart engine and check for proper idle operation.
Inspect
•
Turn ignition switch to the “ON” position for 2 seconds,
then turn to the “OFF” position for 10 seconds. Turn
the ignition switch back to the “ON” position and check
for fuel leaks.