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quires a hex wrench on 1977 and later
model carburetors.
Remove all spring tension by loosening the
locking screw and backing out the adjusting
screw. Close the air valve and turn the ad-
justing screw in until the torsion spring
touches the pin on the shaft, and then turn it
the additional number of turns specified. Se-
cure the locking screw.
DISASSEMBLY AND ASSEMBLY
NOTE: Due to the many minor design
changes in the Quadrajet®, some steps
may not apply to your carburetor. E4ME
carburetors should be serviced only by
qualified,
professional
CAUTION: NEVER immerse any plastic or
rubber carburetor part in carburetor
cleaner. Also, use extreme caution when
handling the carburetor to prevent dam-
aging the throttle shaft or valves.
1. Remove the solenoid and bracket from
the float bowl, if so equipped. Disconnect the
upper choke rod and lever from the choke
shaft (one screw). Rotate the lever to remove
it from the rod. Remove the choke rod by
holding the lower lever outward and twisting
the rod counter-clockwise.
2. Remove the secondary metering rods
and the hanger by removing the small screw
from the hanger. Using a narrow drift punch,
tap the accelerator pump lever pivot pin in
ward, just enough to release the lever. Grasp
the lever and pump rod (together) and rotate
to remove from the throttle linkage.
3. Remove the air horn-to-float bowl
screws (nine).
NOTE: Be sure to remove the two screws
located within the primary venturi area.
You may not notice these screws at first
glance.
Remove the air horn assembly by lifting it
straight up, off of the float bowl.
CAUTION: Use care to avoid damaging the
small brass tubes protruding from the air
horn—these tubes are permanently pressed
into the air horn.
4. Remove the vacuum line from the vac
uum break unit. Remove the vacuum break
assembly and disconnect the rod from the
secondary air valve lever.
CAUTION: Further disassembly of the air
horn is not required. DO NOT remove any
plugs which are located on the air horn.
5. Remove the air horn gasket from the
float bowl. Use care to withdraw the gasket
EMISSION CONTROLS AND FUEL SYSTEM
from beneath the primary metering rod
hanger. Remove tie accelerator pump
plunger from the pump well.
ing rods by pushing downward on the piston
and allowing the assembly to snap back (up
ward). This may have to be repeated several
times to free the plastic power piston retainer
ring.
CAUTION: Do not pry or pull the power
piston from the piston well. Remove the
power piston spring from the well.
float bowl. Remove the float, float retainer,
and needle from the float bowl. Using a large,
flat-bladed screwdriver, remove the needle
seat and gasket.
technicians.
sert from the float bowl. If desired, unscrew
and remove the primary main metering jets
from the float bowl.
charge ball and retainer (appears as a screw
next to the pump well). Remove the secon
dary air baffle, if it is to be replaced.
from the choke housing (three screws). Re
move the choke housing retaining screw from
inside the choke housing. Remove the com
plete choke housing assembly from the fuel
bowl by sliding it outward.
from the float bowl. Remove the lower choke
lever from inside the float bowl by inverting
the float bowl.
filter. Remove the throttle body-to-fuel bowl
screws then remove the throttle body assem
bly and the gasket.
6. Remove the power piston and meter
7. Remove the plastic filler block from the
8. Remove the plastic aneroid cavity in
CAUTION: DO NOT attempt to remove the
secondary main metering jets from the float
bowl, as these jets are permanently fixed to
the bowl.
9. Remove the accelerator pump dis
NOTE: On models using an intake mani-
fold mounted choke thermostat, disassem-
bly of the choke mechanism is not required
to clean the carburetor. On models using a
hot air, carburetor mounted choke assem-
bly, it is not necessary to disassemble the
choke mechanism if you plan to spray car-
buretor cleaner on the carburetor passages
only—if you plan to immerse the carbu-
retor, follow the next two steps to remove
the choke assembly from the float bowl.
10. Remove the choke thermostat cover
11. Remove the secondary lock-out lever
CAUTION: Do not immerse the choke
housing assembly in carburetor cleaner.
12. Remove the fuel inlet nut, gasket, and
159
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