166 EMISSION CONTROLS AND FUEL SYSTEM
freely. Replace the bowl assembly if ball
movement is restricted or if either the ball or
passage are damaged.
7. To disassemble the metering body (all
except 4160 secondary): remove the main
metering jets.
CAUTION:
Use a jet wrench or very wide
screwdriver to prevent damaging the jets.
Use a one-inch, twelve-point socket to re-
move the power valves. On the primary side,
remove the idle mixture screws and seals.
8. On the 4160 secondary: remove the
plate and gasket from the metering body
dowel pins.
9. On the early model 4150: remove the
choke housing, retainer, and gasket. Remove
the choke housing shaft, fast-idle cam, and
choke piston.
10. On kte model 4150 and 4160 carbu
retors: remove the choke vacuum break dis
connecting link, fast-idle cam, and choke le
ver.
11. Remove the discharge nozzle, invert
the carburetor, and shake the discharge
needle out.
12. Replace gaskets, seals, and small parts
with those provided in the rebuilding kit. Re
verse the disassembly procedure to assemble
the carburetor.
Fuel Injection—1963-65
The Rochester fuel injection system was a
performance option on 1963 through 1965 327
cubic inch engines. It delivers a constandy
regulated air/fuel flow regardless of the en-
gine requirements and eliminates carbure-
tion difliculties caused by cornering or brak-
ing. While the fuel injection system is more
complex than the ordinary carburetor, it is
not beyond the repair capabilities of that av-
erage owner/mechanic—provided he ad-
heres to procedure and specification recom-
mendations.
The first hurdle is understanding the de-
sign of the fuel injector and this is best done
by thinking of the unit as three separate sys-
tems, interlocked to accomplish a common
function. The first system is die air meter and
this simultaneously furnishes the fuel meter
with an assessment of die load demands of
the engine and feeds air to the intake mani-
fold. The intake manifold is designed to ram
charge the air as it distributes it to the cylin-
ders. The fuel meter evaluates the air meter
signal and furnishes the correct amount of fuel
to the nozzles where it is injected into the
engine.
DESCRIPTION AND OPERATION
Air Meter
The 1963-1964 air meter consists of three
sub-components: the throttle valve, cold en-
richment valve and diffuser cone assembly,
and die meter housing. The 1965 air meter
Three major components of the fuel injection
system
COLD ENRICHMENT VALVE AND
DIFFUSER CONE ASSEMBLY
SQUARE RING PIEZOMETER
GASKET
RING
Exploded view of the air meter
Fuel injection lines
