CCV HOSE
DESCRIPTION - 8.0L
The 8.0L V-10 engine is equipped with a Crankcase
Ventilation (CCV) system. The CCV system performs
the same function as a conventional PCV system, but
does not use a vacuum controlled valve (PCV valve).
A molded vacuum tube connects manifold vacuum
to the top of the right cylinder head (valve) cover.
The vacuum tube connects to a fixed orifice fitting
(Fig. 1) of a calibrated size 2.6 mm (0.10 inches).
OPERATION - 8.0L
A molded vacuum tube connects manifold vacuum to
the top of the right cylinder head (valve) cover. The vac-
uum tube connects to a fixed orifice fitting (Fig. 1) of a
calibrated size 2.6 mm (0.10 inches). The fitting meters
the amount of crankcase vapors drawn out of the
engine.The fixed orifice fitting is grey in color.A
similar fitting (but does not contain a fixed orifice) is
used on the left cylinder head (valve) cover. This fitting
is black in color. Do not interchange these two fittings.
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 engine combustion.
EVAP/PURGE SOLENOID
DESCRIPTION
All 5.9L/8.0L gasoline powered engines use a duty
cycle EVAP canister purge solenoid. The solenoid reg-ulates the rate of vapor flow from the EVAP canister
to the throttle body.
OPERATION
The Powertrain Control Module (PCM) operates
the solenoid.
During the cold start warm-up period and the hot
start time delay, the PCM does not energize the sole-
noid. When de-energized, no vapors are purged. The
PCM de-energizes the solenoid during open loop oper-
ation.
The engine enters closed loop operation after it
reaches a specified temperature and the time delay
ends. During closed loop operation, the PCM ener-
gizes and de-energizes the solenoid 5 or 10 times per
second, depending upon operating conditions. The
PCM varies the vapor flow rate by changing solenoid
pulse width. Pulse width is the amount of time the
solenoid energizes. The PCM adjusts solenoid pulse
width based on engine operating condition.
REMOVAL
The duty cycle solenoid is attached to a bracket
mounted to the right inner fender (Fig. 2).
(1) Disconnect electrical wiring connector at sole-
noid (Fig. 2).
(2) Disconnect vacuum harness at solenoid.
(3) Remove solenoid from support bracket.
Fig. 1 Fixed Orifice FittingÐ8.0L V-10 EngineÐ
Typical
1 - VACUUM TUBE
2 - FIXED ORIFICE FITTING
3 - COIL PACKS
4 - ORIFICE FITTING HOSE CONNECTIONS
Fig. 2 Duty Cycle EVAP Canister Purge Solenoid
Location
1 - RIGHT-FRONT FENDER
2 - LDP FILTER
3 - DUTY CYCLE SOLENOID
4 - ELEC. CONNEC.
5 - LEAK DETECTION PUMP (LDP) (IF EQUIPPED)
6 - LDP ELEC. CONNEC.
BR/BEEVAPORATIVE EMISSIONS 25 - 33
