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FUEL SYSTEMS |
14 - 3 |
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FUEL DELIVERY SYSTEM |
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INDEX |
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page |
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Chassis Fuel Tubes . . . . . . . . . . . . . . . . . . . . . . |
. . 8 |
Fuel Pump Pressure TestÐAll Except 2.2L/2.5L |
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Fuel FilterÐAll Vehicles . . . . . . . . . . . . . . . . . . . |
. . 8 |
TBI and 3.0L MPI . . . . . . . . . . . . . . . . . . . . |
. . . . 5 |
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Fuel Hoses, Clamps, and Quick Connect Fittings |
. . 3 |
Fuel Pump Removal . . . . . . . . . . . . . . . . . . . . |
. . . 7 |
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Fuel Pump Assembly . . . . . . . . . . . . . . . . . . . . . |
. . 4 |
Fuel System Pressure Release Procedure . . . . |
. . . 3 |
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Fuel Pump Installation . . . . . . . . . . . . . . . . . . . . |
. . 8 |
General Information . . . . . . . . . . . . . . . . . . . . . |
. . . 3 |
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Fuel Pump Pressure TestÐ2.2L/2.5L TBI and |
6 |
Mechanical Malfunctions . . . . . . . . . . . . . . . . . |
. . . 7 |
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3.0L MPI Engines . . . . . . . . . . . . . . . . . . . . . . |
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GENERAL INFORMATION
FUEL SYSTEM PRESSURE RELEASE PROCEDURE
(1)Loosen fuel filler cap to release fuel tank pres-
sure.
(2)Disconnect injector wiring harness from engine or main harness.
(3)Connect a jumper wire from terminal Number 1 (ground) of the injector harness (Fig. 1) to engine ground.
(4)Connect one end of a jumper wire to terminal Number 2 (positive) of the injector harness (Fig. 1). Connect the other end to the positive post of the battery for no longer than 5 seconds. This releases system pressure.
(5)Remove jumper wires.
(6)Continue fuel system service.
Fig. 1 Injector Harness Connections
FUEL HOSES, CLAMPS, AND QUICK CONNECT FITTINGS
HOSES AND CLAMPS
Inspect all hose connections (clamps and quick connect fittings) for completeness and make sure they are not leaking. Hoses that are cracked, scuffed, swelled, rub against other vehicle components or show any sign of wear, should be replaced.
Fuel injected vehicles use specially constructed hoses. When replacing hoses, only use hoses marked EFM/ EFI.
When installing hoses, ensure they are routed away from contact with other vehicle components that could rub against them and cause failure. Avoid contact with clamps or other components that cause abrasions or scuffing. Ensure that rubber hoses are properly routed and avoid heat sources.
The hose clamps have rolled edge to prevent the clamp from cutting into the hose. Only use clamps that are original equipment or equivalent. Other types of clamps may cut into the hoses and cause high pressure fuel leaks. Tighten hose clamps to 1 NIm (10 in. lbs.) torque.
QUICK CONNECT FITTINGS
Some fuel lines have quick connect fittings. The fittings are designed to speed up the installation and removal of the fuel lines (Fig. 2).
Quick connect fittings consist of a metal casing, a black plastic release ring, a metal locking retainer, and internal O-rings.
TUBE/FITTING DISASSEMBLY
WARNING: FUEL SYSTEM PRESSURE MUST BE RELEASED BEFORE DISCONNECTING ANY FUEL SYSTEM COMPONENT.
(1)Disconnect the negative battery cable.
(2)Remove the fuel tank gas cap to release fuel tank pressure.
(3)Perform the Fuel System Pressure Release Procedure.