Vehicle Emission Control Information (Veci) Label; Vacuum Schematics - Jeep Wrangler 1997 Manual

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DESCRIPTION AND OPERATION (Continued)
AIR
TUBE
FIXED
ORIFICE
FITTING
Fig. 5 CCV System-4 .0L Engine
CCV
AIR INLET
'~
eP .~~ I
TUBE
FITTING
80a4a5d7
contains a fixed orifice of a calibrated size. It meters
the amount of crankcase vapors drawn out of the
engine .
On 2.5L 4-cylinder engines, a fitting on drivers
side of cylinder head (valve) cover contains the
metered orifice. It is connected to manifold vacuum .
A fresh air supply CCV tube (hose) from the air
cleaner is connected to front of cylinder head cover
on 4 .OL engines . It is connected to rear of cover on
2 .5L engines.
When the engine is operating, fresh air enters the
engine and mixes with crankcase vapors. Manifold
vacuum draws the vapor/air mixture through the
fixed orifice and into the intake manifold . The vapors
are then consumed during combustion.
VEHICLE EMISSION CONTROL INFORMATION
(VECI) LABEL
All vehicles are equipped with a combined VECI
label . This label is located in the engine compart-
ment (Fig. 6) and contains the following :
" Engine family and displacement
" Evaporative family
" Emission control system schematic
" Certification application
" Engine timing specifications (if adjustable)
" Idle speeds (if adjustable)
" Spark plug and gap
The label also contains an engine vacuum sche-
matic . There are unique labels for vehicles built for
sale in the state of California and the country of
Canada . Canadian labels are written in both the
English and French languages . These labels are per-
EMISSION CONTROL SYSTEMS 25-13
Fig. 6 VECI Label Location
manently attached and cannot be removed without
defacing information and destroying label .
DIAGNOSIS AND TESTING
80a4a5d9
VACUUM SCHEMATICS
A vacuum schematic for emission related items can
be found on the Vehicle Emission Control Informa-
tion (VECI) Label . Refer to VECI Label in this group
for label location.
REMOVAL AND INSTALLATION
EVAP CANISTER
The EVAP canister is located in the engine com-
partment on the left front inner fender (Fig. 7) .
REMOVAL/INSTALLATION
(1) Disconnect vacuum lines at EVAP canister.
Note location of lines before removal .
(2) Remove canister retaining strap bolt.
(3) Remove canister from vehicle .
(4) Reverse the removal procedure for installation .
Align notch (Fig . 7) on EVAP canister to locating
tang on canister mounting bracket .
(5) Tighten canister strap bolt to 5 N-m (45 in.
lbs .) torque.