1999 DODGE RAM fuel
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B - E M IS SIO N A PPLIC ATIO N
1999 D odge P ic ku p R 1500
1999 ENGINE PERFORMANCE
Emission Applications - Trucks
CHRY
EMISSION APPLICATIONS
EMISSION APPLICATIONS \
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Engine & Major Emission Components & Other
Fuel Systems Systems & Devices Related Devices
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2.4L 4-Cyl. SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Caravan & Voyager SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
MIL (
3) EVAP-LDPF, EVAP-VC,
SPK-CC
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2.5L 4-Cyl. SFI (
4) CCV, EVAP, TWC, ( 2) EVAP-PSOL, EVAP-PRRV,
Dakota FR, SPK, (
1) HO2S, ( 2)( 3) EVAP-LDP,
CEC, MIL (
3) EVAP-LDPF,
(
5) EVAP-CVV, EVAP-VC,
SPK-CC
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3.0L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Caravan & Voyager BP/EGR, SPK, (
2)( 6) EVAP-LDP,
(
1) HO2S, CEC, MIL ( 6) EVAP-LDPF, EVAP-VC,
(
2) BP/EGR-BPT, SPK-CC
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3.3L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Caravan, BP/EGR, SPK, (
2)( 3) EVAP-LDP,
Town & Country & (
1) HO2S, CEC, MIL ( 3) EVAP-LDPF, EVAP-VC,
Voyager (
2) BP/EGR-BPT, SPK-CC
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3.8L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Caravan & BP/EGR, SPK, (
2)( 3) EVAP-LDP,
Town & Country (
1) HO2S, CEC, MIL ( 3) EVAP-LDPF, EVAP-VC,
(
2) BP/EGR-BPT, SPK-CC
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3.9L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Dakota & Durango SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
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3.9L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Ram Pickup SPK, (
1) HO2S, CEC, ( 2)( 6) EVAP-LDP,
MIL (
6) EVAP-LDPF,
(
6) EVAP-VV, EVAP-VC,
SPK-CC
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3.9L V6 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Ram Van & SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
Ram Wagon MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
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5.2L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Dakota & Durango SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
Page 598 of 1691
(8) - One used on vehicles with light-duty emissions. Two used on
vehicles with heavy-duty emissions.
(
9) - Used on vehicles with heavy-duty emissions.
(
10 ) - Two catalytic converters are required.
(
11 ) - Four sensors used on vehicles with medium-duty emissions.
Two sensors used on vehicles with heavy-duty emissions.
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ABBREVIATIONS
ABBREVIATION DEFINITIONS\
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Abbreviation Definition
AIH ................................... Air Intake Heaters
AIH-TS ............................ AIH Temperature Sensor
AP ............................. Air Pump Injection System
AP-CKV .................................... AP Check Valve
AP-RV .................................... AP Relief Valve
BP/EGR ........................... Backpressure EGR System
BP/EGR-BPT ................ BP/EGR Backpressure Transducer
CCV ................................ Crankcase Ventilation
CEC ......................... Computerized Engine Controls
CNG ............................... Compressed Natural Gas
EFI ............................ Electronic Fuel Injection
EGR-CKV .................................. EGR Check Valve
EVAP ............................. Fuel Evaporative System
EVAP-CVV ........................ EVAP Canister Vent Valve
EVAP-LDP ........................ EVAP Leak Detection Pump
EVAP-LDPF ................ EVAP Leak Detection Pump Filter
EVAP-PRRV ............ EVAP Pressure Relief Rollover Valve
EVAP-PSOL ............................ EVAP Purge Solenoid
EVAP-VC .............................. EVAP Vapor Canister
EVAP-VV ........................... EVAP Ventilation Valve
FR ................................... Fillpipe Restrictor
HO2S ................................ Heated Oxygen Sensor
MIL .......................... Malfunction Indicator Light
PCV ....................... Positive Crankcase Ventilation
SFI .................. Sequential Multiport Fuel Injection
SPK ....................................... Spark Controls
SPK-CC ........................... SPK Computer Controlled
TWC ........................ Three-Way Catalytic Converter
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Page 599 of 1691
A - E N G IN E/V IN ID
1999 D odge P ic ku p R 1500
1999 ENGINE PERFORMANCE
CHRY - Chrysler Corp. Introduction - Trucks
MODEL IDENTIFICATION
1999 MODEL COVERAGE \
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MODEL BODY ENGINE ENGINE FUEL IGNITION
CODE ID
(1) SYSTEM SYSTEM
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Caravan & NS 2.4L B SFI (
2) DIS ( 3)
Grand Caravan
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3.0L 3 SFI (
2) Hall Effect
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3.3L R SFI DIS (
3)
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3.3L G (
4) SFI DIS ( 3)
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3.8L L SFI DIS (
3)
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Dakota AN 2.5L P SFI (
2) Hall Effect
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3.9L X SFI (
2) Hall Effect
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5.2L Y SFI (
2) Hall Effect
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5.9L Z SFI (
2) Hall Effect
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Durango DN 3.9L X SFI (
2) Hall Effect
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5.2L Y SFI (
2) Hall Effect
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5.9L Z SFI (
2) Hall Effect
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Ram Pickup (
5) 3.9L X SFI ( 2) Hall Effect
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5.2L Y SFI (
2) Hall Effect
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5.9L LD (
6) Z SFI ( 2) Hall Effect
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5.9L HD (
7) 5 SFI ( 2) Hall Effect
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5.9L Diesel 6 EFI (
8) N/A
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8.0L W SFI (
2) DIS ( 3)
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Ram Van & AB 3.9L X SFI (
2) Hall Effect
Ram Wagon
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5.2L Y SFI (
2) Hall Effect
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5.2L 2 (
9) SFI ( 2) Hall Effect
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5.2L T (
10) SFI ( 2) Hall Effect
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5.9L Z SFI (
2) Hall Effect
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Town & Country NS 3.3L R SFI DIS (
3)
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3.3L G (
4) SFI DIS ( 3)
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Page 600 of 1691
![DODGE RAM 1999 Service Repair Manual 3.8L L SFI DIS (3)
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\](/manual-img/12/56915/w960_56915-599.png "DODGE RAM 1999 Service Repair Manual 3.8L L SFI DIS (3)
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3.8L L SFI DIS (3)
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Voyager & NS 2.4L B SFI DIS (
3)
Grand Voyager
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3.0L 3 SFI DIS (
3)
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3.3L R SFI DIS (
3)
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3.3L G (
4) SFI DIS ( 3)
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3.8L L SFI DIS (
3)
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(
1) - Engine may be identified by 8th character of Vehicle
Identification Number (VIN).
(
2) - Sequential Fuel Injection.
(
3) - Distributorless Ignition System.
(
4) - Engine code "G" indicates flex-fuel.
(
5) - Body code for standard pickup is BR. Body code for
Quad Cab is BE.
(
6) - Light-duty emissions.
(
7) - Heavy-duty emissions.
(
8) - Electronic fuel injection.
(
9) - Engine code "2" indicates Liquid Propane Gas (LPG).
(
10 ) - Engine code "T" indicates Compressed Natural Gas (CNG).
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Fig. 1: VIN Definition
MODEL/YEAR VIN CODE APPLICATIONS
MODEL/YEAR VIN CODE APPLICATION
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Fig. 3: Typical Thermostatic Air Cleaner System
FUEL EVAPORATIVE SYSTEM (EVAP)
The EVAP system allows for proper fuel system ventilation
while preventing fuel vapors from reaching the atmosphere. This means
that vapors must be caught and stored while the engine is off, which
is when most fuel evaporation occurs. When the engine is started,
these fuel vapors can be removed from storage and burned. In most
systems, storage is provided by an activated charcoal (or carbon)
canister. See Fig. 4. On a few early systems, charcoal canisters are
not used. Instead, fuel vapors are vented into the PCV system and
stored inside the crankcase.
The main components of a fuel evaporation system are a sealed
fuel tank, a liquid-vapor separator and vent lines to a vapor-storing
canister filled with activated charcoal. The filler cap is normally
not vented to the atmosphere, but is fitted with a valve to allow both
pressure and vacuum relief.
Although a few variations do exist between manufacturers,
basic operation is the same for all systems. Check for presence of
vapor storage canister or crankcase storage connections when required.
Ensure required hoses, solenoids, etc., are present and connected
properly. Check for proper type fuel tank cap. Check for any non-OEM
or auxiliary fuel tanks for compliance and the required number of
evaporation canisters.
Page 605 of 1691
Fig. 4: Typical Fuel Evaporative System
CATALYTIC CONVERTERS
Oxidation Catalyst (OC)
This type of converter is the most common. It may use pellets
or monolith medium, depending upon application. See Fig. 5. Platinum
and palladium (or platinum alone) are used as catalyst in this type of\
converter.
Visually check for presence of catalytic converter(s). Check
for external damage such as severe dents, removed or damaged heat
shields, etc. Also check for pellets or pieces of converter in the
tailpipe.
Fig. 5: Typical Oxidation Catalytic Converter (Pellet Type) Shown;
Typical Three-Way Catalytic Converter Is Similar
Courtesy of General Motors Corp.
Three-Way Catalyst (TWC)
This type of converter is nearly identical to a conventional
Page 606 of 1691
converter with the exception of the catalyst. See Fig. 5. The TWC
converter uses rhodium, with or without platinum, as its catalyst.
Rhodium helps reduce NOx emissions, as well as HC and CO.
Visually check for presence of catalytic converter(s). Also
check for presence of any required air supply system for the oxidizing
section of the converter. Check for external damage such as severe
dents, removed or damaged heat shields, etc. Check for pellets or
pieces of converter in the tailpipe.
Three-Way Catalyst + Oxidation Catalyst (TWC + OC)
This system contains a TWC converter and an OC converter in a
common housing, separated by a small air space. See Fig. 6. The 2
catalysts are referred to as catalyst beds. Exhaust gases pass through
the TWC first. The TWC bed performs the same function as it would as a
separate device, reducing all 3 emissions. As exhaust gases leave the
bed, they pass through the air space and into the second (OC)
converter catalyst bed.
Visually check for presence of catalytic converter(s). Check
for external damage such as severe dents, removed or damaged heat
shields, etc. Check for pellets or pieces of converter in the
tailpipe.
Fig. 6: Typical Three-Way + Oxidation Catalytic Converter
Courtesy of General Motors Corp.
FILL PIPE RESTRICTOR (FR)
A fuel tank fill pipe restrictor is used to prohibit the
introduction of leaded fuel into the fuel tank. Unleaded gasoline pump
dispensers have a smaller diameter nozzle to fit fuel tank of vehicle
requiring the use of unleaded fuel (vehicles equipped with catalytic
converter).
Visually inspect fill pipe restrictor(s) for tampering, i.e.,\
restrictor is oversize or the flapper is non-functional. If vehicle is
equipped with an auxiliary fuel tank, ensure auxiliary fuel tank is
also equipped with a fill pipe restrictor.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
Page 613 of 1691
Spark control systems are designed to ensure the air/fuel
mixture is ignited at the best possible moment to provide optimum
efficiency and power and cleaner emissions.
Ensure vacuum hoses to the distributor, carburetor, spark
delay valves, thermal vacuum switches, etc., are in place and routed
properly. On Computerized Engine Controls (CEC), check for presence of\
required sensors (O2, MAP, CTS, TPS, etc.). Ensure they have not been
tampered with or modified.
Check for visible modification or replacement of the feedback
carburetor, fuel injection unit or injector(s) with a non-feedback
carburetor or fuel injection system. Check for modified emission-
related components unacceptable for use on pollution-controlled
vehicles.
AIR INJECTION SYSTEM (AIS)
Air Pump Injection System (AP)
The air pump is a belt-driven vane type pump, mounted to
engine in combination with other accessories. The air pump itself
consists of the pump housing, an inner air cavity, a rotor and a vane
assembly. As the vanes turn in the housing, filtered air is drawn in
through the intake port and pushed out through the exhaust port. See
Fig. 13 .
Check for missing or disconnected belt, check valve(s),
diverter valve(s), air distribution manifolds, etc. Check air
injection system for proper hose routing.
Fig. 13: Typical Air Pump Injection System
Courtesy of General Motors Corp.
Pulsed Secondary Air Injection (PAIR) System
PAIR eliminates the need for an air pump and most of the
associated hardware. Most systems consists of air delivery pipe(s),
pulse valve(s) and check valve(s). The check valve prevents exhaust
gases from entering the air injection system. See Fig. 14.
Ensure required check valve(s), diverter valve(s), air
distribution manifolds, etc., are present. Check air injection system
for proper hose routing.