Fleetwood FWD V8-300 4.9L (1993)
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The throttle switch is open.
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Vehicle speed greater than 10 mph.
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Engine speed (RPM) above a threshold.
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Codes E013, E017, E042, E043, E044 or E045 is present.
If the solenoid is closed, (not receiving power or has a stuck plunger), the canister will not purge to the intake manifold. This will prevent the canister
from purging fuel vapors and could result in a complaint of fuel odors coming from the engine compartment.
When the engine is "OFF", vapor is prohibited from entering the canister by means of a remote mounted Tank Pressure Control Valve (TPCV). The
TPCV has a relief feature that allows vapor to pass from the fuel tank to the canister when the presure in the fuel tank exceeds 5.0 kPa (.72 psi).
When the engine is running, a manifold vacuum signal to the TPCV opens the valve and allows full-time vapor passage from the fuel tank to the charcoal
canister. A vacuum relief feature allows vapor to travel from the canister back to the fuel tank during cool down periods.
