1982 CHEVROLET CAMARO Repair Guide

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 705

Fig. 39: Removing the rear carburetor at taching bolts (note: a long extension is
helpful here)

Fig. 40: Removing the front carburetor attaching bolts

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 706

Fig. 41: Always replace this gasket anytime the carburetor is removed

Fig. 42: The emission hose routing sticker under the hood is helpful when
installing the carburetor

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 707

Fig. 43: The adjustment specifications on the emission control information label
must always be followed
ROCHESTER E4ME AND E4MC 1. Disconnect the battery and remove the air cleaner.
2. Disconnect the accelerator linkage.
3. Disconnect the transmission detent cable.
4. If equipped, remove the cr uise control cable.
5. Tag and detach all of the necessa ry vacuum lines and electrical
connections.
6. Disconnect the fuel line at the carburetor inlet.
7. Remove the attaching bolts and remove the carburetor.
To install: 8. Position the carburetor onto the manifold and install the attaching bolts.
9. Connect the fuel line at the carburetor inlet.
10. Attach all of the vacuum lines and electrical connections, as tagged
during removal.
11. If equipped, install the cruise control.
12. Connect the transmission detent cable.
13. Connect the accelerator linkage.
14. Install the air cleaner and connect the battery.
OVERHAUL
Carburetor overhaul kits are reco mmended for each overhaul. These kits
contain all gaskets and new parts to re place those which deteriorate most

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 708
rapidly. Failure to replace all parts s
upplied with the kit (especially gaskets) can
result in poor performance later.
Some carburetor manufacturers supply overhaul kits for three basic types:
minor repair; major repair; and gasket kits. Certain parts may be expected in
most kits based on the desired degree of overhaul.
MINOR REPAIR KITS
• All gaskets
• Float needle valve
• All diaphragms
• Spring for the pump diaphragm
MAJOR REPAIR KITS
• All jets and gaskets
• All diaphragms
• Float needle valve
• Pump ball valve
• Float
• Complete intermediate rod
• Intermediate pump lever
• Some cover hold-down screws and washers
GASKET KITS
• All gaskets
Efficient carburetion depends greatly on careful cleaning and inspection during
overhaul, since dirt, gum, water, or varnis h in or on the carburetor parts are
often responsible for poor performance.
Overhaul your carburetor in a clean, dust-free area. Carefully disassemble the
carburetor, referring often to the explod ed views and directions packaged with
the rebuilding kit. Keep all similar and look-alike parts separated during
disassembly and cleaning to avoid accidental interchange during assembly\
.
Make a note of all jet sizes.
When the carburetor is disassembled, wash all parts (except diaphragms,
electric components, pump pl unger, and any other plastic, leather, fiber, or
rubber parts) in clean carbur etor solvent. Do not leave parts in the solvent any
longer than is necessary to sufficiently loosen the deposits. Excessive cleaning
may remove the special finish from the float bowl and choke valve bodies,
leaving these parts unfit for service. Rinse all parts in clean solvent and blow
them dry with compressed air or allow them to air dry. Wipe clean all cork,
plastic, leather, and fiber parts with a clean, lint-free cloth.
Blow out all passages and jets with comp ressed air and be sure that there are
no restrictions or blockages. Never use wi re or similar tools to clean jets, fuel

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passages, or air bleeds. Clean all jets and va
lves separately to avoid accidental
interchange.
Check all parts for wear or damage. If we ar or damage is found, replace the
defective parts. Especially check the following:
1. Check the float needle and seat for wear.
2. Check the float hinge pin for wear and the float(s) for dents or distortion.
Replace the float if fuel has leaked into it.
3. Check the throttle and choke sha ft bores for wear or an out-of-round
condition. Damage or wear to the thro ttle arm, shaft, or shaft bore will
often require replacement of the throttle body. These parts require a
close tolerance of fit; wear may allow air leakage, which could affect
starting and idling.
Throttle shafts and bushings are not included in overhaul kits. They can be
purchased separately or repaired by a qualified carburetor overhaul shop.
4. Inspect the idle mixt ure adjusting needles for bu rrs or grooves. Any such
condition requires replacement of t he needle, since you will not be able
to obtain a satisfactory idle.
5. Test the accelerator pump check va lves. They should pass air one way
but not the other. Test for proper s eating by blowing and sucking on the
valve. Replace the valve check ball and spring as necessary. If the valve
is satisfactory, wash the valve part s again to remove breath moisture.
6. Check the bowl cover for war ped surfaces with a straightedge.
7. Closely inspect the accelerato r pump plunger for wear and damage,
replacing as necessary.
8. After the carburetor is assembled, check the choke valve for freedom of
operation.
9. Check, repair or replace parts, if the following problems are encountered:
FLOODING
• Inspect the float valve and seat for dirt, deep wear grooves, scores and
improper sealing
• Inspect the float valve pull clip for proper installation; be careful no\
t to
bend the pull clip
• Inspect the float, the float arms and the hinge pin for distortion, binds,
and burrs. Check the density of the mate rial in the float; if heavier than
normal, replace the float
• Clean or replace the fuel inlet f ilter and check the valve assembly
HESITATION
• Inspect the pump plunger for cracks, scores or cup excessive wear. A
used pump cup will shrink w hen dry. If dried out, soak in fuel for 8 hours
before testing
• Inspect the pump duration and return springs for weakness or distortion \

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•

Check the pump passages and the jet(s) for dirt, improper seating of the
discharge checkball or t he temperature bypass disc and/or scores in the
pumpwell. Check the condition of t he pump discharge check ball spring,
replace as necessary
• Check the pump linkage for excessiv e wear; repair or replace as
necessary
HARD STARTING-POOR COLD OPERATION
• Check the choke valve and linkage for excessive wear, binds or
distortion
• Test the vacuum break diaphragm(s) for leaks
• Clean or replace the fuel filter
• Inspect the float valve fo r sticking, dirt, etc.
• Also check the items under "Flooding"
POOR PERFORMANCE-POOR GAS MILEAGE
• Clean all fuel and vacuum passages in the castings
• Check the choke valve fo r freedom of movement
• Check the Mixture Control (M/C) soleno id for sticking, binding or leaking
• Check the air valve and secondary me tering rod for binding conditions. If
the air valve or metering rod is da maged or the metering rod adjustment
is changed from the factory setting, the air horn assembly must be
replaced. Also check the air valve le ver spring for proper installation
ROUGH IDLE
• Inspect the gasket and gasket mating su rfaces on the casting for nicks,
burrs or damage to the sealing beads
• Check the operation and sealing of the mixture control solenoid
• Clean all of the idle field passages
• If removed, inspect the idle mixture needle for ridges, burrs or being bent
• Check the throttle lever and valves for binds, nicks. or other damage
• Check all of the diaphragms for possible ruptures or leaks
After cleaning and checking all components, reassemble the carburetor, using
new parts and referring to the exploded view. When reassembling, make sure
that all screws and jets are tight in their seats, but do not overtighten as the tips
will be distorted. Tighten al l screws gradually, in rotation. Do not tighten needle
valves into their seats; uneven jetting will result. Always use new gaskets. Be
sure to follow all assembly and adjustment procedures.
Before performing any service on the carburet or, it is essential that it be placed
on a suitable holding fixtur e, such as tool J-9789-118, BY-30-15 or equivalent.
Without the use of the holding fixture, it is possible to damage throttle valves or
other parts of the carburetor.

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THROTTLE BODY INJECTION SYSTEM

SYSTEM DESCRIPTION
The throttle body injection (TBI) system used on 2.5L (VIN 2) and 5.0L (VIN E)
engines is centrally located
on the intake manifold. Its function is to supply the
correct air/fuel mixture to the engine, as directed by the Engine Control Module
(ECM).
The TBI unit consists of two relatively simple casting assemblies: a throttle body
and a fuel metering assembly. Components include, a pressure regulator, idle
air control valve, fuel injector(s), thro ttle position sensor, fuel inlet and a fuel
return fitting.
The Throttle Body Injection identifi cation number is stamped on the lower
mounting flange located near the TPS. Th e number is in alphabetical code and
should be noted before servicing the unit.
An oxygen sensor in the exhaust syst em functions to provide feedback
information to the ECM as to oxygen content in the exhaust. The ECM then
uses this information to modify fuel de livery to achieve as near as possible an
ideal air/fuel ratio of 14.7 :1. This ratio permits the ca talytic converter to become
more effective in reducing emissions wh ile providing acceptable driveability.
Should you encounter any type of engine performance problem, have a
complete CCC system test performed by a qualified, professional technician. If
the fault lies in the injection system, you can use the following procedures to
remove the TBI unit and replace the defective component(s).
RELIEVING FUEL SYSTEM PRESSURE
1. Disconnect the negative battery cable to prevent fuel discharge if the key
is accidentally turned to the RUN position.
2. Loosen the fuel filler cap to relieve fuel tank pressure and do not tighten
until service has been completed.
3. Fuel system pressure is automatic ally relieved when the engine is turned
OFF. No further action is necessary.
When disconnecting fuel lines, there ma y still be a small amount of fuel
released. Cover the fuel line connection wi th a shop cloth to collect the fuel,
then place the cloth in an approved container.
ELECTRIC FUEL PUMP
REMOVAL & INSTALLATION
The fuel pump is part of t he fuel sender assembly located inside the fuel tank.
1. Release the fuel syst em pressure and disconnec t the negative battery
cable.

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2. Drain the fuel tank, then raise
and safely support the vehicle.
3. Remove the fuel tank from the vehicle.
4. Clean the area surrounding t he sender assembly to prevent
contamination of the fuel system.
5. Remove the fuel sender fr om the tank as follows:
a. Use tool J-24187 or equivalent to remove the sending unit
retaining cam. Remove the fuel sender and O-rings from the tank.
Discard the O-rings.
6. If necessary, separate the fuel pum p from the sending unit assembly.
To install: 7. If removed, install the fuel pump to the sending unit. If the strainer was
removed, it must be re placed with a new one.
8. Inspect and clean the O-ring mating surfaces.
9. Install a new O-ring in the groove around the tank opening. If applicable,
install a new O-ring on t he fuel sender feed tube.
10. Install the fuel sender assembly as follows: a. The fuel pump strainer must be in a horizontal position, and when
installed, must not block the travel of the float arm. Gently fold the
strainer over itself an d slowly position the sending assembly in the
tank so the strainer is not dam aged or trapped by the sump walls.
11. Install the retaining cam us ing tool J-24187 or equivalent.
12. Install the fuel tank assembly.
13. Lower the vehicle.
14. Fill the fuel tank, tighten the f uel filler cap and connect the negative
battery cable.

Fig. 1: Fuel pump and sending unit assembly