Jeep Cherokee 1999 Electronic Service Manual page 1265

14 - 22 FUEL SYSTEM—2.5L DIESEL ENGINE
REM OVAL AN D I N STALLAT I ON (Cont inue d)
(10) Con n ect n ega t ive ca ble fr om ba t t er y.
(11) F ill fu el t a n k. Ch eck for lea ks.
(12) In st a ll fu el filler ca p.
HIGH-PRESSURE LINES
All h igh –pr essu r e fu el lin es a r e of t h e sa m e len gt h
a n d in side dia m et er. Cor r ect h igh –pr essu r e fu el lin e
u sa ge a n d in st a lla t ion is cr it ica l t o sm oot h en gin e
oper a t ion .
CAUTION: The high–pressure fuel lines must be
clamped securely in place in the holders. The lines
cannot contact each other or other components. Do
not attempt to weld high–pressure fuel lines or to
repair lines that are damaged. Only use the recom-
mended lines when replacement of high–pressure
fuel line is necessary.
REMOVAL
(1) Discon n ect n ega t ive ba t t er y ca ble fr om ba t t er y.
(2) Rem ove t h e n ecessa r y cla m ps h oldin g t h e lin es
t o t h e en gin e.
(3) Clea n t h e a r ea a r ou n d ea ch fu el lin e con n ec-
t ion . Discon n ect ea ch lin e a t t h e t op of ea ch fu el
in ject or (F ig. 46).
Fig. 46 Fuel Lines at Fuel Injectors
(4) Discon n ect ea ch h igh –pr essu r e lin e fit t in g a t
ea ch fu el in ject ion pu m p deliver y va lve.
(5) Ver y ca r efu lly r em ove ea ch lin e fr om t h e
en gin e. Not e t h e posit ion (fir in g or der ) of ea ch lin e
wh ile r em ovin g. D o n o t be n d th e lin e w h ile
re m o v in g .
CAUTION: Be sure that the high–pressure fuel lines
are installed in the same order that they were
removed. Prevent the injection pump delivery valve
holders from turning when removing or installing
high–pressure lines from injection pump.
INSTALLA TION
(1) Ca r efu lly posit ion ea ch h igh –pr essu r e fu el lin e
t o t h e fu el in ject or a n d fu el in ject ion pu m p deliver y
va lve h older in t h e cor r ect fir in g or der. Also posit ion
ea ch lin e in t h e cor r ect lin e h older.
(2) Loosely in st a ll t h e lin e cla m p/h older bolt s.
(3) Tigh t en ea ch lin e a t t h e deliver y va lve t o 30
N·m (22 ft . lbs.) t or qu e.
(4) Tigh t en ea ch lin e a t t h e fu el in ject or t o 30 N·m
(22 ft . lbs.) t or qu e.
B e s u re th e lin e s a re n o t c o n ta c tin g e a c h
o th e r o r a n y o th e r c o m p o n e n t.
(5) Tigh t en t h e cla m p br a cket bolt s t o 24 N·m (18
ft . lbs.) t or qu e.
(6) Bleed a ir fr om t h e fu el syst em . Refer t o t h e Air
Bleed P r ocedu r e sect ion of t h is gr ou p.
SPECI FI CAT I ON S
FUEL TANK CAPACITY
75 Lite rs (20.0 Ga ls .)
Nom in a l r efill ca pa cit ies a r e sh own . A va r ia t ion
m a y be obser ved fr om veh icle t o veh icle du e t o m a n -
u fa ct u r in g t oler a n ces, a m bien t t em per a t u r es a n d
r efill pr ocedu r es.
IDLE SPEED
900 rp m 25 rp m wit h en gin e a t n or m a l oper a t -
in g t em per a t u r e.
FUEL INJECTOR FIRING SEQUENCE
1–3–4–2
FUEL SYSTEM PRESSURE
P e a k In je c tio n P re s s u re /F u e l In je c tio n P u m p
Op e ra tin g P re s s u re : 40,000–45,000 kP a (5801–
6526 psi).
Op e n in g P re s s u re o f F u e l In je c to r:
15,000–15,800 kP a (2175–2291 psi).
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