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FUEL SYSTEM
6C-25
-
IDLE RESTRICTION
-
-
'E.G.R. (EXHAUST GAS
IDLE PASSAGE
\A
i
ch
IDLE TUBE
MAIN WELL INSERT
y
A>
M A I N
I
9
METERING
J ETS
U
E.G.R. *VALVE
T I M ; D - &
T I M E D V A C U U M
I
CANISTER
, P O
RT,
-
TIMED SPAR K
"E.G.R. TUBE
RESTRICTION
CANISTER
PURGE
OFF IDLE
TUBE
DISCHARGE
DISCHARGE
THROTTLE
HOLE
PORTS
VALVE
Fig. 6C-42 ldle System 2GC California
PULL OVER
ENRICHMENT
M A I N WELL
/
I
THROTTLE
VALVE
Fig. 6C-43 ldle System 2GE
ldle Mixture
See idle mixture adjustments at the end of this section.
Carburetor Replacement
Removal
Flooding,
stumble
on
acceleration
and
other
performance complaints are, in many instances, caused by
presence of dirt, water or other foreign matter in carburetor.
T o aid in diagnosis, the carburetor should be carefully
removed from engine without draining fuel from bowl.
Contents of fuel bowl may then be examined for
contamination as carburetor is disassembled. Check filter.
1. Remove air cleaner and gasket.
2. Disconnect fuel and vacuum lines from carburetor.
3. Disconnect accelerator linkage and electrical
connectors.
4.
Remove carburetor attaching bolts and remove
carburetor and gasket.
Installation
Fill carburetor bowl before installing carburetor. This
reduces strain on starting motor and battery and reduces the
possibility of backfiring while attempting to start engine. A
small supply of no-lead fuel will enable carburetor to be filled
and the operation of float and inlet needle and seat to be
checked. Operate throttle lever several times and check
discharge from pump jets before installing carburetor.
1. Be certain throttle body and intake manifold sealing
surfaces are clean.
2. Install carburetor to manifold gasket.
3. Place carburetor in position and loosely install four
attaching bolts.
4.
Install vacuum lines and loosely connect fuel line.
5.
Tighten four attaching bolts to
145
in. Ibs.
6.
Tighten fuel inlet nut to 300 inch pounds.
7. Connect accelerator linkage and downshift controls
if so equipped.
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