Jeep Grand Cherokee WK. Manual - part 1258

LINES, FUEL

DESCRIPTION

Also refer to Quick-Connect Fittings.

WARNING: THE FUEL SYSTEM MAY BE UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF).
BEFORE SERVICING ANY FUEL SYSTEM HOSES, FITTINGS, LINES, OR MOST COMPONENTS, FUEL SYS-
TEM PRESSURE MUST BE RELEASED. REFER TO THE FUEL SYSTEM PRESSURE RELEASE PROCEDURE.

The lines/tubes/hoses used on fuel injected vehicles are of a special construction. This is due to the higher fuel
pressures and the possibility of contaminated fuel in this system. If it is necessary to replace these lines/tubes/
hoses, only those marked EFM/EFI may be used.

If equipped: The hose clamps used to secure rubber hoses on fuel injected vehicles are of a special rolled edge
construction. This construction is used to prevent the edge of the clamp from cutting into the hose. Only these rolled
edge type clamps may be used in this system. All other types of clamps may cut into the hoses and cause high-
pressure fuel leaks.

Use new original equipment type hose clamps.

FITTING, QUICK CONNECT

DESCRIPTION

Different types of quick-connect fittings are used to attach the various fuel system components, lines and tubes.
These are: a single-button type, a two-button type, a pinch type, a single-tab type, a two-tab type or a plastic
retainer ring type. Some are equipped with safety latch clips. Some may require the use of a special tool for dis-
connection and removal. Refer to Quick-Connect Fittings Removal/Installation for more information.

CAUTION: Before separating a quick-connect fitting, pay attention to what type of fitting is being used by
referring to Quick-Connect Fitting Removal. This will prevent unnecessary fitting or fitting latch breakage.

CAUTION: The interior components (o-rings, clips) of quick-connect fittings are not serviced separately, but
new plastic spacers and latches are available for some types. If service parts are not available, do not
attempt to repair the damaged fitting or fuel line (tube). If repair is necessary, replace the complete fuel line
(tube) assembly.

STANDARD PROCEDURE - QUICK-CONNECT FITTINGS

DISCONNECTING

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH ENGINE OFF). BEFORE
SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, FUEL SYSTEM PRESSURE MUST BE RELEASED.
REFER TO FUEL SYSTEM PRESSURE RELEASE PROCEDURE.

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FUEL DELIVERY

1. Perform fuel pressure release procedure. Refer to Fuel Pressure Release Procedure.

2. Disconnect negative battery cable from battery.

3. Clean fitting of any foreign material before disassembly.

4. Single–Button Type Fitting: This type of fitting is

equipped with a single push-button (2) located on
the quick-connect fitting.

5. The push-button is attached to two internal latches

(1). To disconnect, press on push-button with your
thumb and unlatch fitting from fuel line. Special
tools are not required for disconnection. DO NOT
ATTEMPT TO PRY OR PULL UP ON PUSH-BUT-
TON. LATCHES WILL BE BROKEN.

FUEL DELIVERY

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6. Perform fuel pressure release procedure. Refer to

Fuel Pressure Release Procedure.

7. Disconnect negative battery cable from battery.

8. Clean fitting of any foreign material before disas-

sembly.

9. 2–Button Type Fitting: This type of fitting (1) is

equipped with a push-button located on each side
of quick-connect fitting (2). Press on both buttons
simultaneously for removal. Special tools are not
required for disconnection.

10. Pinch-Type Fitting: This fitting (1) is equipped

with two finger tabs (2). Pinch both tabs together
while removing fitting. Special tools are not
required for disconnection.

11. Single-Tab Type Fitting: This type of fitting (3) is

equipped with a single pull tab (1). The tab is
removable. After tab is removed, quick-connect fit-
ting can be separated from fuel system compo-
nent.

Special

tools

are

not

required

for

disconnection.

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FUEL DELIVERY

12. Press release tab on side of fitting to release pull

tab (1). If release tab is not pressed prior to
releasing pull tab, pull tab will be damaged.

13. While pressing release tab on side of fitting, use

screwdriver (2) to pry up pull tab.

14. Raise pull tab until it separates from quick-con-

nect fitting.

15. Two-Tab Type Fitting: This type of fitting (2) is

equipped with tabs located on both sides of fitting
(1). The tabs are supplied for disconnecting quick-
connect fitting from component being serviced.

a. To disconnect quick-connect fitting, squeeze

plastic retainer tabs (1) against sides of quick-
connect fitting with your fingers. Tool use is not
required for removal and may damage plastic
retainer.

b. Pull fitting from fuel system component being

serviced.

c. The plastic retainer will remain on component

being serviced after fitting is disconnected. The
o-rings and spacer will remain in quick-connect
fitting connector body.

16. Plastic Retainer Ring Type Fitting: This type of

fitting can be identified by the use of a full-round
plastic retainer ring (4) usually black in color.

a. To release fuel system component from quick-

connect fitting, firmly push fitting towards com-
ponent being serviced while firmly pushing
plastic retainer ring into fitting (6). With plastic
ring depressed, pull fitting from component.
The plastic retainer ring must be pressed
squarely into fitting body. If this retainer is
cocked during removal, it may be difficult
to disconnect fitting. Use an open-end
wrench on shoulder of plastic retainer ring
to aid in disconnection.

b. After disconnection, plastic retainer ring will

remain with quick-connect fitting connector
body.

c. Inspect fitting connector body, plastic retainer

ring and fuel system component for damage. Replace as necessary.

FUEL DELIVERY

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