1982 CHEVROLET CAMARO air hose

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 537
ENGINE CONTROLS

EMISSION CONTROLS

CRANKCASE VENTILATION SYSTEM
OPERATION
The Positive Crankcase Ventilation (PCV ) system is used to control crankcase
blow-by vapors. As the engine is running, clean, filtered air is drawn through the
air filter and into the crankcase. As the air passes through the crankca\
se, it
picks up the combustion gases and carries them out of the crankcase, through
the PCV valve, and into the induction system . As they enter the intake manifold,
they are drawn into the combustion chamber where they are reburned.
The most critical component in the system is the PCV valve. This valve controls
the amount of gases which are recycled into the combustion chamber. At low
engine speeds, the valve is partially clos ed, limiting the flow of gases into the
intake manifold. As engine speed incr eases, the valve opens to admit greater
quantities of gases into the intake manifold. If the PCV valve becomes clogged,
the system is designed to allow excessive amounts of blow-by gases to back
flow through the crankcase tube into the air cleaner to be consumed by normal
combustion.

Fig. 1: PCV flow on 4, 6 and 8cylinder engines
SERVICE
Inspect the PCV system hose and connecti ons at each tune-up and replace any
deteriorated hoses. Check the PCV valve at every tune-up and replace it at
30,000 mile intervals.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 538
TESTING
1. Remove the PCV valve from the intake manifold or valve cover.
2. Run the engine at idle.
3. Place your thumb over the end of the valve. Check for vacuum. If there is
no vacuum at the valve, check fo r plugged valve or vacuum lines.

Fig. 2: Check the PCV valve for vacuum at idle
4. Shut off the engine. Shake the valv e and listen for the rattle. If valve
doesn't rattle, replace it.
REMOVAL & INSTALLATION
PCV SYSTEM FILTER
1. To replace the PCV filter discon nect the hose, if equipped, attached to
the filter at the air cl eaner and remove the air cleaner cover. Slide the
spring clamp off of the filter and re move it from the air cleaner.
2. Inspect the rubber grommet in the valve cover and the hose for signs of \
deterioration, brittleness and cracking. Replace as necessary.
3. Installation is the reverse of removal.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 539
PCV VALVE
1. Disconnect the hose or pi pe from the PCV valve.
2. Gently pull the PCV valv e out of the grommet in the valve cover or intake
manifold.
3. Installation is the reverse of removal.

Fig. 3: PCV system on Tuned Port Injection equipped engines

Fig. 4: PCV filter location on most carbureted and throttle body injected engines

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 540

Fig. 5: Most PCV valves are lo cated in the rocker arm covers

Fig. 6: Once the valve has been withdraw n from the rocker cover, it can be
removed from the hose and replaced

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 544
TESTING
TANK PRESSURE CONTROL VALVE
1. Using a hand-held vacuum pump, apply a vacuum of 15 in. Hg. (51 kPa)
through the control vacuum signal tube to the purge valve diaphragm. If
the diaphragm does not hold 5 in. Hg . at least for 10 seconds, the
diaphragm is leaking. Repl ace the control valve.
2. With the vacuum still applied to t he control vacuum tube, attach a short
piece of hose to the valve's tank tube side and blow into the hose. Air \
should pass through the valve. If it does not, replace the control valve.
REMOVAL & INSTALLATION
CANISTER 1. Disconnect the negative battery cable.
2. Loosen the screw holding the c anister retaining bracket.
3. Remove the canister.
4. Tag and disconnect the hoses leading from the canister.
To install: 5. Connect the hoses to the cani ster according to the tags.
6. Install the canister into the retaining bracket.
7. Tighten the screw holding the c anister retaining bracket.
8. Reconnect the negative battery cable.

Fig. 5: A common EEC canister location

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 545

Fig. 6: Be sure to label the hoses bef ore disconnecting them to avoid confusion
later
FILTER
Not all models use canister s with replaceable filters.
1. Remove the vapor canister.
2. Pull the filter out from the bottom of the canister.
3. Install a new filter and then replace the canister.
CANISTER PURGE SOLENOID 1. Disconnect the negative battery cable.
2. Remove the bolt, cover and solenoid.
3. Disconnect the electrical wirin g and hoses from the solenoid.
4. Remove the solenoid.
To install: 5. Install the solenoid, cover and bolt.
6. Connect the hoses and elec trical wiring solenoid.
7. Connect the negative battery cable.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 546

Fig. 7: A common canister purge solenoid location
TANK PRESSURE CONTROL VALVE 1. Disconnect the hoses fr om the control valve.
2. Remove the mounting hardware.
3. Remove the control valve from the vehicle.
4. Installation is the reverse of the re moval procedure. Refer to the Vehicle
Emission Control Information (VECI) label, located in the engine
compartment (if present) or the diagram s found later in this section, for
proper routing of the vacuum hoses.

GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 552

Fig. 6: Some EGR valves may be test ed using a vacuum pump by watching for
diaphragm movement
3. With the car in either P or N, increase the engine speed until at least 5 in.
Hg is showing on the gauge.
4. Remove the vacuum hose from t he EGR valve. The diaphragm should
move downward (valve closed). The engine speed should increase.
5. Install the vacuum hose and watch for the EGR valve to open (diaphragm moving upward). The engine speed should decrease to its
former level, indicating exhaust recirculation.
6. If the diaphragm doesn't move, c heck engine vacuum; it should be at
least 5 in. Hg with the throttle open and engine running.
7. Check to see that the engine is at normal operating temperature.
8. Check for vacuum at the EGR hose. If no vacuum is present, check the
hose for leaks, breaks, kinks, improper connections, etc., and replace as
necessary.
9. If the diaphragm move s, but the engine speed doesn't change, check the
EGR passages in the intake manifold for blockage.
REMOVAL & INSTALLATION
EGR VALVE
EXCEPT 3.1L ENGINE 1. Disconnect the negative battery cable.
2. Remove the air cleaner assembly, if necessary.