Fuel Rail Description - Dodge Sprinter 2006 Manual

14 - 22 FUEL DELIVERY
FU EL RAI L
DESCRIPTION
Th e fu el r a il a ct s like a h igh pr essu r e st or e. It is
a va ila ble t o a ll in ject or s for dr a win g fu el wh ich h a s
been com pr essed by t h e h igh pr essu r e in ject ion
pu m p. Th e r a il pr essu r e sen sor, r a il pr essu r e con t r ol
va lve, h igh pr essu r e lin e, a n d t h e r et u r n flow lin e
a r e a t t a ch ed t o t h e fu el r a il.
OPERA TION
Th e st or ed fu el volu m e in side t h e r a il a ct s a s a
da m per for pr essu r e
beca u se of pu lsa t in g su pply a n d br ief la r ge ext r a c-
t ion s of fu el du r in g in ject or fir in g. Th e r a il pr im a r ily
in flu en ces t h e a t om iza t ion of fu el a t t h e in ject or n oz-
zle, a n d t h e a ccu r a cy of in ject ed qu a n t it y du r in g
in ject ion .
REMOVAL
(Refer t o 14 - F UE L SYSTE M - WARNING).
WARNING: NO SPARKS, OPEN FLAMES OR SMOK-
ING. RISK OF POISONING FROM INHALING AND
SWALLOWING FUEL. RISK OF INJURY TO EYES
AND SKIN FROM CONTACT WITH FUEL. POUR
FUELS ONLY INTO SUITABLE AND APPROPRI-
ATELY MARKED CONTAINERS. WEAR PROTECTIVE
CLOTHING.
(1) Discon n ect n ega t ive ba t t er y ca ble.
(2) Rem ove t h e en gin e cover.
(3) Discon n ect t h e in t a ke m a n ifold a ir in let du ct
a n d posit ion a side.
(4) Discon n ect t h e fu el r a il pr essu r e a n d con t r ol
va lve wir in g h a r n ess con n ect or s.
(5) Rem ove en gin e h a r n ess r et a in in g bolt s a n d
u n clip t h e en gin e h a r n ess fr om t h e fu el r a il.
(6) Rem ove in ject or h igh pr essu r e lin es (F ig. 19)
(7) Rem ove fu el r a il r et a in in g bolt s (F ig. 19).
CAUTION: When slackening and tightening fuel
injection line union nuts, counter hold with wrench
at threaded connection. ON NO ACCOUNT exceed
the tightening torque at any time. Do NOT crimp or
bend lines.
NOTE: After removing lines, seal connections and
ensure cleanliness.
flu ct u a t ion s wh ich r esu lt
Fig. 19 FUEL RAIL
1 - CAMSHAFT POSITION SENSOR
2 - FUEL INJECTOR
3 - FUEL INJECTOR VALLEY DRAIN
4 - FUEL RAIL PRESSURE CONTROL VALVE
5 - BANJO BOLT
6 - FUEL RAIL
7 - HIGH PRESSURE FUEL LINE
(8) Det a ch fu el r et u r n flow lin e t o h igh pr essu r e
pu m p a t r a il
(9) Det a ch fu el r et u r n flow lin e a t ba n jo bolt (F ig.
19)
(10) Rem ove fu el r a il.
INSTALLA TION
(Refer t o 14 - F UE L SYSTE M - WARNING)
WARNING: NO FIRE, FLAMES OR SMOKING. RISK
OF POISONING FROM INHALING OR SWALLOWING
FUEL. RISK OF INJURY TO EYES AND SKIN FROM
CONTACT WITH FUEL. POUR FUELS ONLY INTO
SUITABLE AND APPROPRIATELY MARKED CON-
TAINERS. WEAR PROTECTIVE CLOTHING.
(1) Loosely posit ion fu el r a il in t o pr oper posit ion
on t h e cylin der h ea d a n d h a n d t igh t en t h e fa st en er s.
(2) Con n ect t h e fu el pr essu r e con t r ol va lve h a r n ess
con n ect or (F ig. 19).
(3) Con n ect t h e fu el r et u r n lin es a t t h e ba n jo bolt
(F ig. 19).
CAUTION: Inspect sealing cones at the lines.
Replace as necessary. Ensure that all fuel pressure
lines are exactly located in original position.
(4) In st a ll t h e h igh pr essu r e fu el lin es a n d h a n d
t igh t en .
VA