Checking Pcv System; Pcv Hoses; Checking Pcv Valve For Sticking; Maintenance Service - Suzuki Samurai 1986 Service Manual

5-3. MAINTENANCE SERVICE

GENERAL

If the emission control hoses were disconnected
and any system component was removed for
service, be sure to reinstall the component
properly and route and connect hoses correctly
after service. Refer to Fig. 5-l-l for hose con-
PCV SYSTEM

Checking PCV System

NOTE:
If the engine is idling rough, this may be caused
by a stuck PCV valve, plugged hoses or vacuum
leakage of PCV line, therefore, never adjust the
carburetor idle without first checking the PCV
valve and hoses.

[ PCV hoses]

Check hoses for connection, leakage, clog, and
deterioration. Replace as necessary.
Disconnect PCV hoses at three way joint.
Run engine at idle.
Place your thumb over the end of disconnect-
ed PCV hose to check for vacuum. If there is
no vacuum, check for clogged hose or valve.
Replace
as necessary.
Fig. 5-3- 1 Checking vacuum
5-18
2. PCV hose
3. Three way joint
4) After checking vacuum, stop engine and check
PCV valve for sticking.
With engine stopped, 'remove PCV hose and
connect a new hose to PCV valve.
Blow air into new hose and check that air
flows with difficulty from cylinder head side
to intake manifold side. If air flows without
difficulty, the valve is stuck in "Open"
position. Replace PCV valve. Before installing
new PCV valve to intake manifold, wind
sealing tape on thread of the valve.
WARNING:
Do not suck air through PCV valve. The
petroleum substances inside the valve and
fuel vapor inside intake manifold are
harmful.
Fig. 5-3-2 Checking PCV valve for sticking
1. PCV valve
2.
New PCV hose
3. Blow air