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All 3.9L/5.2L/5.9L/8.0L gasoline powered engines
use a duty cycle EVAP canister purge solenoid. The
solenoid regulates the rate of vapor flow from the
EVAP canister to the throttle body. 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.
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
(2) Disconnect vacuum harness at solenoid.
(3) Remove solenoid from support bracket.
(1) Install solenoid assembly to support bracket.
(2) Connect vacuum harness.
(3) Connect wiring connector.
DESCRIPTION - EVAP SYSTEM
The evaporation control system prevents the emis-sion
of fuel tank vapors into the atmosphere. When
fuel evaporates in the fuel tank, the vapors pass
through vent hoses or tubes into the two charcoal
filled evaporative canisters. The canisters tempo-rarily
hold the vapors. The Powertrain Control Mod-ule
(PCM) allows intake manifold vacuum to draw
vapors into the combustion chambers during certain
use a duty cycle purge system. The PCM controls
vapor flow by operating the duty cycle EVAP purge
solenoid. Refer to Duty Cycle EVAP Canister Purge
Solenoid for additional information.
When equipped with certain emissions packages, a
Leak Detection Pump (LDP) will be used as part of
the evaporative system. This pump is used as part of
OBD II requirements. Refer to Leak Detection Pump
in this group for additional information.
NOTE: The hoses used in this system are specially
manufactured. If replacement becomes necessary, it
is important to use only fuel resistant hose.
TORQUE - EVAP SYSTEM
DESCRIPTION N·m Ft. Lbs. In. Lbs.
EVAP Canister Mounting Nuts 9n-m (newton-meters) 80 in/lb (inch/pounds)
Leak Detection Pump Mounting Screws 1n-m 11in/lb
Leak Detection Pump Filter Mounting
7n-m 65in/lb htis did not come out real well let me know if you need it typed better
Hope this helps
If this helps click accept thanks again David