1982 CHEVROLET CAMARO gas type

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 666
FUEL SYSTEM

BASIC FUEL SYSTEM DIAGNOSIS

When there is a problem star ting or driving a vehicle, two of the most important
checks involve the ignition and the fuel systems. The questions most mechanics
attempt to answer first, "is there spark?" an d "is there fuel?" will often lead to
solving most basic problems. For igni tion system diagnosis and testing, please
refer to the information on engine electr ical components and ignition systems
found earlier in this repair guide. If the ignition system checks out (there is
spark), then you must determine if the f uel system is operating properly (is there
fuel?).

CARBURETED FUEL SYSTEM

MECHANICAL FUEL PUMP
All fuel pumps used on carbureted V6 and V8 engines are of the diaphragm
type and are serviced by replacement onl y. No adjustments or repairs are
possible. The fuel pump is mounted on th e left front (V6) and right front (V8) of
the engine.
The fuel pumps are also equipped with vapor return lines for purposes of
emission control and to reduce vapor lock. All pumps are operated by an
eccentric on the camshaft. On V6 an d V8 engines, a pushrod between the
camshaft eccentric and the fuel pump operates the pump.
REMOVAL & INSTALLATION
When disconnecting the fuel pump outlet fitting, always use two wrenches to
avoid twisting the line.
1. Disconnect the fuel in take and outlet lines at the pump, then plug the
pump intake line.
2. Remove the two pump mounting bol ts and lockwashers; remove the
pump and its gasket.
3. If the pump pushrod is to be remo ved from the V8, remove the two
adapter bolts and lockwashers, then re move the adapter and its gasket.
4. Install the fuel pump with a new gasket reversing the removal procedure.
Coat the mating surfaces with sealer.
5. Connect the fuel lines and check for leaks.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 669
1. Disconnect the pressure gauge. R
un the fuel line into a graduated
container.
2. Run the engine at idle until one pint of gasoline has been pumped. One
pint should be delivered in 30 seconds or less. There is normally enough
fuel in the carburetor float bowl to perform this test, but refill it if
necessary.
3. If the delivery rate is below the mini mum, check the lines for restrictions
or leaks, then r eplace the pump.
CARBURETORS
The V6 engine is equipped with the Ro chester E2SE carburetor, V8 engines
use the E4ME and E4MC. These carburet ors are of the downdraft design and
are used in conjunction with the CCC system for fuel cont rol. They have special
design features for optimum air/fuel mixt ure control during all ranges of engine
operation.
An electric solenoid in the carburetor controls the air/fu el ratio. The solenoid is
connected to an Electronic Control Module (ECM) which is an on-board
computer. The ECM provides a controllin g signal to the solenoid. The solenoid
controls the metering rod(s) and an id le air bleed valve, thereby closely
controlling the air/fuel ratio throughout the operating range of the engine.
MODEL IDENTIFICATION
General Motors Rochester carburetors ar e identified by their model code. The
first number indicates the number of ba rrels, while one of the last letters
indicates the type of choke used. These are V for the manifold mounted choke
coil, C for the choke coil mounted in the carburetor body, and E for electric
choke, also mounted on the carburetor. Model codes ending in A indicate an
altitude-compensatin g carburetor.
Because of their intricate nature and co mputer controls, the E2SE, E4ME and
E4MC carburetors should only be se rviced by a qualified technician.
PRELIMINARY CHECKS
The following should be observed befor e attempting any adjustments.
1. Thoroughly warm the engine. If the engine is cold, be sure that it reaches
operating temperature.
2. Check the torque of all carburet or mounting nuts and assembly screws.
Also check the intake manifold-to-cyli nder head bolts. If air is leaking at
any of these points, any attempts at adjustment will inevitably lead to
frustration.
3. Check the manifold heat control valve (if used) to be sure that it is free.
4. Check and adjust the choke as necessary.
5. Adjust the idle speed and mixture. If the mixture screws are capped,
don't adjust them unless all other c auses of rough idle have been
eliminated. If any adjustments are per formed that might possibly change

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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

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 716
INJECTOR REPLACEMENT
Use care in removing injectors to prev
ent damage to the electrical connector
pins on top of the injector, the fuel injector fuel filter and nozzle. The fuel injector
is serviced as a complete assembly on ly and should never be immersed in any
type of cleaner.
SINGLE INJECTOR UNITS 1. Relieve the fuel system pressure.
2. Remove the air cleaner.
3. Detach the injector connector by squeezing the two tabs together and
pulling straight up.
4. Remove the screws securing the fuel meter cover. Note the location of
any short screws for correct placement during reassembly.
CAUTION - DO NOT remove the four screws se curing the pressure regulator to
the fuel meter cover. The fuel pressure regulator includes a large spring under
heavy tension which could cause personal injury if released.
5. With the old fuel meter gasket in place to prevent damage to the casting,
use a prytool and fulcrum to pry the inje ctor carefully until it is free from
the fuel meter body.
6. Remove the injector.
7. Remove the large O-ring and steel back-up washer at the top of the
injector cavity in the fuel meter body.
8. Remove the small O-ring located at the bottom of the injector cavity.
To Install: 9. Lubricate the new, small O-ring with automatic transmission fluid; then,
push the new O-ring on the nozzle end of the injector up against the
injector fuel filter.
10. Install the steel backup washer in the recess of the fuel meter body.
Lubricate the new large O-ring with automatic transmission fluid, then
install the O-ring directly above t he backup washer, pressing the O-ring
down into the cavity recess. The O-ri ng is properly installed when it is
flush with the casting surface.
WARNING - Do not attempt to reverse this procedure and install the backup
washer and O-ring after the injector is located in the cavity. To do so will
prevent proper seating of the O-ring in th e cavity recess which could result in a
fuel leak and possible fire.
11. Install the injector by using a pushing/twisting mo tion to center the nozzle
O-ring in the bottom of the injector cavity and aligning the raised lug on
the injector base with the notch cast into the fuel meter body. Push down
on the injector making sure it is fully seated in the cavity. Injector
installation is correct when the lug is seated in the notch and the
electrical terminals are parallel to the throttle shaft.

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•

Type 2: Compress retaining spring from valve while turning valve
in with a clockwise motion. Return spring to original position with
straight portion of spring end aligned with flat surface of valve.
On IAC valves that have already been in service, do not push or pull on the
valve pintle. The force required to move the pintle may damage the threads on
the worm drive.
5. Use a new gasket or O-ring and install the IAC valve into the throttle body.
6. Allow the ECM to reset the idle air control valve using the procedure
described earlier in this section.

Fig. 1: Idle air control valve installation
CROSSFIRE INJECTION SYSTEM

SYSTEM DESCRIPTION
The Model 400 Electronic Fuel Injection (EFI) system is a computer controlled
system that uses a pair of Throttle Body Injection (TBI) units, which are
mounted on a single manifold cover on t he 5.0L (VIN 7) engine. Since each TBI
feeds the cylinders on the opposite side of the engine, the system has acquired
the name of Crossf ire Injection.
Fuel is supplied, by an electric fuel pum p located in the fuel tank, to the front
TBI fuel accumulator. From the accumulator, it is carried to the rear TBI fuel
pressure regulator by a c onnecting tube. Unused fuel is sent to the fuel tank
through a separate return line.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 751
13. Lubricate a new outlet tube 0-ring and in
stall it on the end of the tube.
14. Connect the regulator base to the fuel outlet tube, then to the fuel rail.
15. Finger-tighten the base-to-rail screw.
16. Install the pressure regulator br acket. Finger-tighten the screws only.
17. Lubricate a new rear crossover tube O-ring and install it on the end of the
tube.
18. Install the rear crossover tube to the regulator base.
19. Install the crossover tube reta iner and finger-tighten the screw.
20. Tighten all attaching screws to 44 inch lbs. (5 Nm).
21. Install the fuel rail assembly.
22. Temporarily connect the negative battery cable. a. With the engine OFF and the igniti on ON, check for fuel leaks.
b. Disconnect the negative battery cable.
23. Install the intake plenum and runners.
24. Connect the negative battery cable.
IDLE AIR CONTROL VALVE
REMOVAL & INSTALLATION 1. Unplug the electrical connector from idle air control valve.
2. Remove the idle air control valve.
To install: 3. Before installing the idle air contro l valve, measure the distance that the
valve is extended. Measurement s hould be made from the motor housing
to the end of the cone. It should not exceed 28.5mm (1
1/8 in.), or damage
to the valve may occur when installed.
4. On 1985-1992 models, identify the replacement IAC valve as being
either Type 1 (with collar at electric terminal end) or Type 2 (without
collar). If measuring distance is great er than specified above, proceed as
follows:
• Type 1: Use finger pressure to slowly retract the pintle.
• Type 2: Compress retaining spring from valve while turning valve
in with a clockwise motion. Return spring to original position with
straight portion of spring end aligned with flat surface of valve.
On IAC valves that have already been in service, do not push or pull on the
valve pintle. The force required to move the pintle may damage the threads on
the worm drive.
5. Use a new gasket or O-ring and install the IAC valve into the throttle body.
6. Allow the ECM to reset the idle air control valve using the procedure
described earlier in this section.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 780
If the drain plug is equipped with a re
movable washer or gasket, check its
condition and replace, if necessary , to provide a leakproof seal.
5. Quickly withdraw the plug and move your hands out of the way. Allow the
oil to drain completely into the pan, then install and carefully tighten the
drain plug. Be careful not to overtighten the drain plug, otherwise you'\
ll
be buying a new pan or a replacem ent plug for stripped threads.

Fig. 5: Use a wrench or a socket to l oosen the oil pan drain plug, but use care,
the engine oil may be very hot
Although some manufacturers recommend c hanging the oil filter every other oil
change, we recommend the filter be chan ged each time you change your oil.
The old filter will contain up to a quart of dirty oil, which will contaminate the
clean oil. Also, the benefit of clean oil is quickly lost if the old filter is clogged.
The added protection for your engine far outweighs the few dollars saved by
using an old filter.
6. Move the drain pan under the oil filter. Use a strap-type or cap-type filter
wrench to loosen and remove the oil f ilter from the engine block. Keep in
mind that it's holding about one quart of hot, dirty oil.
7. Empty the old f ilter into the drain pan and proper ly dispose of the filter.
8. Using a clean rag, wipe off the filt er adapter on the engine block. Be sure
that the rag doesn't leave any lint which could clog an oil passage.
9. Coat the rubber gasket on the filter with fresh oil, then spin it onto the
engine by hand; when the gasket touches the adapter surface, give it
another
1/3-1/2 turn, (but no more, or you'll squash the gasket and it will
leak).