Dodge Ram Truck 1500-2500-3500. Manual — part 2093

1. Slip lower canister pins (7) into rubber grommets.

Install lower canister (6) and nuts (5).

2. Install upper canister (1). Install NVLD filter support

bracket (2) and install nuts (4).

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EVAPORATIVE EMISSIONS

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3. Install NVLD filter (2) and nut (1).

4. Carefully install vapor/vacuum lines, and fuel tubes/

lines (1) to each EVAP canister. Install bolts (6).

5.

The vapor/vacuum lines and hoses must be

firmly connected. Also check the vapor/vacuum
lines at the NVLD Pump, LDP, LDP filter and
EVAP canister purge solenoid for damage or
leaks. If a leak is present, a Diagnostic Trouble
Code (DTC) may be set.

6. If necessary, install skid plate(s).

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EVAPORATIVE EMISSIONS

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EXHAUST GAS RECIRCULATION

TABLE OF CONTENTS

page

page

VALVE-EGR

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . 46

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . 47

REMOVAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . 50

VALVE-EGR

DESCRIPTION

4.7L Engine

The electronic EGR valve and solenoid assembly (3)
is attached to the rear of the left cylinder head. An
exhaust gas routing tube (1) connects the EGR valve
to the intake manifold.

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EXHAUST GAS RECIRCULATION

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5.7L Engine

The electronic EGR valve and solenoid assembly (2)
is attached to the front of the right cylinder head. An
exhaust gas routing tube (4) connects the EGR valve
to the intake manifold.

OPERATION

Exhaust gas recirculation flow is determined by the Powertrain Control Module (PCM) and is controlled by an elec-
tronic EGR valve assembly. For a given set of conditions, the PCM knows the ideal exhaust gas recirculation flow
to optimize NOx and fuel economy as a function of the pintle position. Pintle position is obtained from the position
sensor. The PCM adjusts the duty cycle of 128 Hz power supplied to the solenoid coil to obtain the correct position.

The electronic EGR valve assembly consists of a pintle, valve seat, and housing which contains and regulates
exhaust gas flow. An armature, return spring, and solenoid coil provide the operating force to regulate exhaust gas
flow by changing the pintle position. The solenoid coil assembly is wired in parallel with a diode that connects two
internal connectors.

REMOVAL

4.7L Engine

The electronic EGR valve and solenoid assembly (4)
is attached to the rear of the left cylinder head. An
exhaust gas routing tube (3) connects the EGR valve
to the intake manifold.

1. Remove electrical connector (5) at top of EGR

valve solenoid.

2. Remove tube mounting bolt (1) at intake manifold.

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EXHAUST GAS RECIRCULATION

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