Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Durango 1998-2000 Approved Dodge Durango 1998-99 98DN_14
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DN FUEL SYSTEM 14 - 1
FUEL SYSTEM
CONTENTS
page page
FUEL DELIVERY SYSTEM . . . . . . . . . . . . . . . . . . . 3 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 1
FUEL INJECTION SYSTEM . . . . . . . . . . . . . . . . . 23
GENERAL INFORMATION
INDEX
page page
GENERAL INFORMATION GASOLINE/OXYGENATE BLENDS . . . . . . . . . . . . 1
FUEL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL INFORMATION Poor quality gasoline can cause problems such as
hard starting, stalling, and stumble. If you experi-
INTRODUCTION ence these problems, try another brand of gasoline
Throughout this group, references may be made to before considering service for the vehicle.
a particular vehicle by letter or number designation.
A chart showing the breakdown of these designations GASOLINE/OXYGENATE BLENDS
is included in the Introduction Section at the front of Some fuel suppliers blend unleaded gasoline with
this service manual. materials that contain oxygen such as alcohol, MTBE
The Evaporation Control System, is also considered (Methyl Tertiary Butyl Ether) and ETBE (Ethyl Ter-
part of the fuel system. The system reduces the emis- tiary Butyl Ether). Oxygenates are required in some
sion of fuel vapor into the atmosphere. areas of the country during winter months to reduce
The description and function of the Evaporation carbon monoxide emissions. The type and amount of
Control System is found in Group 25 of this manual. oxygenate used in the blend is important.
The following are generally used in gasoline
FUEL REQUIREMENTS blends:
Your vehicle was designed to meet all emission reg- Ethanol - (Ethyl or Grain Alcohol) properly
ulations and provide excellent fuel economy when blended, is used as a mixture of 10 percent ethanol
using high quality unleaded gasoline. and 90 percent gasoline. Gasoline blended with etha-
Use unleaded gasolines having a minimum posted nol may be used in your vehicle.
octane of 87. MTBE/ETBE - Gasoline and MTBE (Methyl Ter-
If your vehicle develops occasional light spark tiary Butyl Ether) blends are a mixture of unleaded
knock (ping) at low engine speeds this is not harm- gasoline and up to 15 percent MTBE. Gasoline and
ful. However; continued heavy knock at high speeds ETBE (Ethyl Tertiary Butyl Ether) are blends of gas-
can cause damage and should be reported to your oline and up to 17 percent ETBE. Gasoline blended
dealer immediately. Engine damage as a result of with MTBE or ETBE may be used in your vehicle.
heavy knock operation may not be covered by the Methanol - Methanol (Methyl or Wood Alcohol) is
new vehicle warranty. used in a variety of concentrations blended with
In addition to using unleaded gasoline with the unleaded gasoline. You may encounter fuels contain-
proper octane rating, those that contain detergents, ing 3 percent or more methanol along with other
corrosion and stability additives are recommended. alcohols called cosolvents.
Using gasolines that have these additives will help DO NOT USE GASOLINES CONTAINING
improve fuel economy, reduce emissions, and main- METHANOL.
tain vehicle performance.
14 - 2 FUEL SYSTEM DN
GENERAL INFORMATION (Continued)
Use of methanol/gasoline blends may result in Chrysler Corporation strongly supports the use of
starting and driveability problems and damage criti- reformulated gasolines whenever available. Although
cal fuel system components. your vehicle was designed to provide optimum perfor-
Problems that are the result of using methanol/ mance and lowest emissions operating on high qual-
gasoline blends are not the responsibility of Chrysler ity unleaded gasoline, it will perform equally well
Corporation and may not be covered by the vehicle and produce even lower emissions when operating on
warranty. reformulated gasoline.
Reformulated Gasoline Materials Added to Fuel
Many areas of the country are requiring the use of Indiscriminate use of fuel system cleaning agents
cleaner-burning fuel referred to as Reformulated should be avoided. Many of these materials intended
Gasoline. Reformulated gasolines are specially for gum and varnish removal may contain active sol-
blended to reduce vehicle emissions and improve air vents of similar ingredients that can be harmful to
quality. fuel system gasket and diaphragm materials.
DN FUEL SYSTEM 14 - 3
FUEL DELIVERY SYSTEM
INDEX
page page
DESCRIPTION AND OPERATION SERVICE PROCEDURES
FUEL DELIVERY SYSTEM . . . . . . . . . . . . . . . . . . 3 FUEL SYSTEM PRESSURE RELEASE
FUEL FILTER/FUEL PRESSURE REGULATOR . . . 4 PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . 10
FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . . 4 FUEL TUBES/LINES/HOSES AND CLAMPS . . . . 11
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . 5 QUICK-CONNECT FITTINGS . . . . . . . . . . . . . . . 11
FUEL PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 REMOVAL AND INSTALLATION
FUEL PUMP MODULE . . . . . . . . . . . . . . . . . . . . . 3 ACCELERATOR PEDAL . . . . . . . . . . . . . . . . . . . 21
FUEL RAIL--3.9/5.2/5.9L ENGINES . . . . . . . . . . . 6 FUEL FILTER/FUEL PRESSURE REGULATOR . . 15
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . 17
FUEL TANK FILLER TUBE CAP . . . . . . . . . . . . . . 6 FUEL INJECTOR RAIL--3.9/5.2/5.9L ENGINES . . 17
QUICK-CONNECT FITTINGS . . . . . . . . . . . . . . . . 6 FUEL INJECTOR(S) . . . . . . . . . . . . . . . . . . . . . . 19
ROLLOVER VALVE(S) . . . . . . . . . . . . . . . . . . . . . 5 FUEL PUMP INLET FILTER . . . . . . . . . . . . . . . . 16
DIAGNOSIS AND TESTING FUEL PUMP MODULE . . . . . . . . . . . . . . . . . . . . 16
FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . 10 FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
FUEL INJECTOR TEST . . . . . . . . . . . . . . . . . . . 10 FUEL TANK FILLER TUBE CAP . . . . . . . . . . . . . 21
FUEL PRESSURE LEAK DOWN TEST . . . . . . . . . 7 THROTTLE CABLE . . . . . . . . . . . . . . . . . . . . . . 21
FUEL PUMP AMPERAGE TEST . . . . . . . . . . . . . . 8 SPECIFICATIONS
FUEL PUMP CAPACITY TEST . . . . . . . . . . . . . . . 7 FUEL SYSTEM PRESSURE . . . . . . . . . . . . . . . . 22
FUEL PUMP PRESSURE TEST--ALL ENGINES FUEL TANK CAPACITY . . . . . . . . . . . . . . . . . . . 22
WITH PRESSURE TEST PORT . . . . . . . . . . . . . 6 TORQUE CHART . . . . . . . . . . . . . . . . . . . . . . . . 22
VECI LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DESCRIPTION AND OPERATION A fuel filler/vent tube assembly using a pressure/
vacuum fuel filler cap is used. On vehicles equipped
FUEL DELIVERY SYSTEM with the California emissions package, the fuel filler
The fuel delivery system consists of: tube contains a spring-loaded flap (door) located
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