3C - 8 Fuel Metering System 8.1L
MEFI 4 - PCM
Throttle Body Assembly
Throttle Body Removal
Caution: Safety glasses must be worn when using
compressed air, as flying dirt particles may cause
eye injury.
• Clean all metal parts thoroughly and blow dry with
compressed air. Be sure that all fuel and air passages
are free of dirt and burrs.
• Inspect the mating surfaces for damage that could
affect gasket sealing.
• Inspect throttle body for cracks in casting.
• The thread-locking compound supplied in the service
repair kit is a small vial of thread-locking compound
with directions for use. If this material is not available,
use Loctite® 262 or equivalent.
Notice: When precoating the mounting bolts, do not use
a higher strength locking compound than recommended.
This may cause the removal of the bolts to be very
diffi cult.
Install or Connect
1. Install a new throttle body gasket.
2. Install the throttle body assembly and the throttle body
assembly attaching nuts.
Tighten
Tighten the throttle body assembly attaching nuts to
10 N
.
m (89 lb in).
3. Reconnect the throttle cable.
4. Reconnect the electrical connectors to the IAC valve
and the TP sensor.
5. Install the fl ame arrestor and clamp. Securely tighten
the clamp.
6. Reconnect the negative battery cable.
Throttle Body Assembly Replacement
Remove or Disconnect
1. Disconnect the negative battery cable.
2. Remove the fl ame arrestor clamp and fl ame arrestor.
3. Disconnect the electrical connectors from the IAC
valve and the TP sensor.
4. Disconnect the throttle cable.
5. Remove the throttle body assembly attaching nuts.
6. Remove the throttle body assembly and gasket.
7. Discard the gasket.
Important: To o prevent damage to the throttle valve, it
is essential that the unit be placed on a holding fi xture
before performing service.
Notice: Stuff a rag in the intake manifold opening to prevent
foreign material from entering the engine.
Inspect
• Manifold bore for loose parts and foreign material.
• Manifold mating surface for cleanliness or burrs that
could affect gasket sealing.
Important: Clean the throttle bore and valve deposits
using carburetor cleaner and a parts cleaning brush. Do
Not use a cleaner that contains methyl ethyl ketone, an
extremely strong solvent, and not necessary for this type
of deposit.
The throttle body metal parts may be cleaned in a cold,
immersion type cleaner following the disassembly of the
unit.
Notice: The TP sensor and IAC valve should not come in
contact with solvent or cleaner, as they may be damaged.
These components must be removed before immersion.
Follow the procedures outlined in this section.
To Next Page
Loading...
Need help?
General
