Dodge RAM 1500 1998 Owner's Manual page 1571

14 - 2 FUEL DELIVERY - GAS
FUEL DELIVERY - GAS (Continued)
1 - FUEL TANK
2 - CHECK VALVE
3 - LIQUID EXPANSION CHAMBER
4 - FUEL FILTER / FUEL PRESSURE REGULATOR
5 - QUICK-CONNECT FITTING AND FUEL LINE (TO ENGINE)
6 - EVAP LINE CONNECTION
7 - LEAK DETECTION PUMP FRESH AIR LINE
OPERATION
Fuel is returned through the fuel pump module
and back into the fuel tank through the fuel filter/
fuel pressure regulator. A separate fuel return line
from the engine to the tank is not used.
The fuel tank assembly consists of: the fuel tank,
fuel pump module assembly, fuel pump module lock-
nut/gasket, and fuel tank check valve (refer to Fuel
Tank Check Valve for information).
A fuel filler/vent tube assembly using a pressure/
vacuum, 1/4 turn fuel filler cap is used. The fuel
filler tube contains a flap door located below the fuel
fill cap.
Also to be considered part of the fuel system is the
evaporation control system. This is designed to
reduce the emission of fuel vapors into the atmo-
Fig. 1 FUEL DELIVERY COMPONENTS
8 - LDP FRESH AIR FILTER
9 - LEAK DETECTION PUMP
10 - EVAP CANISTERS (2)
11 - FUEL TANK STRAPS (2)
12 - CHECK VALVE
13 - FUEL PUMP MODULE LOCK RING
14 - FUEL PUMP MODULE
sphere. The description and function of the Evapora-
tive Control System is found in Emission Control
Systems.
and within fuel pressure regulator) are designed for
extended service. They do not require normal sched-
uled maintenance. Filters should only be replaced if
a diagnostic procedure indicates to do so.
STANDARD PROCEDURE - FUEL SYSTEM
PRESSURE RELEASE
rail is, or is not equipped with a fuel pressure
test port.
Both fuel filters (at bottom of fuel pump module
Use following procedure if the fuel injector
(1) Remove fuel fill cap.
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