178 EMISSION CONTROLS AND FUEL SYSTEM
Fuel meter body attaching screws
c. If the injectors are to be removed
from both TBI units, mark them so that
they may be reinstalled in their original
units.
4. Remove the filter from the base of the
injector by rotating it back and forth.
5. Remove the O-ring and the steel washer
from the top of the fuel meter body, then re
move the small O-ring from the bottom of the
injector cavity.
6. Remove the fuel inlet and outlet nuts
(and gaskets) from the fuel meter body.
7. Remove the fuel meter body assembly
and the gasket from the throttle body assem
bly (three screws).
8. For the rear TBI unit only: Remove the
throttle position sensor (TPS) from the throt
tle body (two screws). If necessary, remove
the screw which holds the TPS actuator lever
to the end of the throttle shaft.
9. Remove the idle air control motor from
the throttle body.
CAUTION:
Because the TPS and idle air
control motors are electrical units, they
must not be immersed in any type of clean-
ing solvent.
ASSEMBLY
NOTE:
During assembly, replace the gas-
kets, injector washer, O-rings, and pres-
sure regulator dust seal with new equiva-
lents.
1. Install the idle air control motor in the
throttle body, using a new gasket. Torque the
retaining screws to 13 ft. Ibs.
NOTE:
DO NOT overtighten the screws.
2. For the rear TBI unit only: If re
moved, install the TPS actuator lever by
aligning the flats of the lever and the shaft.
Install and tighten the retaining screw.
3. Install the fuel meter body on the
throttle body, using a new gasket. Also, ap
ply thread locking compound to the three fuel
meter body screws according to the chemical
manufacturers instructions. Torque the
screws to 35 inch Ibs.
4. Install the fuel inlet and outlet nuts,
using new gaskets. Torque the nuts to 260
inch Ibs.
5. Carefully twist the fuel filter onto the
injector base.
6. Lubricate the new O-rings with lith
ium grease.
7. Install the small O-ring onto the injec
tor, pressing it up against the fuel filter.
8. Install the steel washer into the injec
tor cavity recess of the fuel meter body. In
stall the large O-ring above the steel washer,
in the cavity recess. The O-ring must be flush
with the fuel meter body surface.
9. Using a pushing/twisting motion, care
fully install the injector. Center the nozzle
O-ring in the bottom of the injector cavity and
align the raised lug on the injector base with
die notch in the fuel meter body cavity. Make
sure the injector is seated fully in the cavity.
The electrical connections should be parallel
to the throttle shaft of the throttle body.
10. For the rear TBI unit only: Install the
new pressure regulator dust seal into the fuel
meter body recess.
11. Install the new fuel meter cover and
fuel outlet passage gaskets on the fuel meter
cover.
12. Install the fuel meter cover assembly,
using thread locking compound on the five
retaining screws. Torque the screws to 28 inch
Ibs. Note that the two short screws must be
FUEL METER
BODY ATTACHING
SCREWS
FUEL INJECTOR
ASSEMBLY
FUEL INJECTOR
FILTER
SMALL "0" RING
LARGE "O" RING
STEEL BACK-UP
WASHER
FUEL METER
BODY
Fuel injector installation
