Fuel Pump; Fuel Delivery - Dodge Sprinter 2006 Manual

VA
INSTALLA TION
(1) In st a ll t h e sea lin g r in g on t o t h e sen sor a n d
scr ew t h e fu el pr essu r e sen sor in t o t h e fu el r a il.
(2) Tigh t en t h e sen or t o 60 N·m (44 ft . lbs.), ba ck
it off 90 degr ees a n d r et igh t en t o 80 N·m (59 ft . lbs.)
(F ig. 4).
(3) Con n ect t h e sen sor wir in g h a r n ess con n ect or.
CAUTION: Care must be taken when installing the
engine cover. Assure the proper routing of the fuel
injector return fuel hose to the banjo bolt fitting in
the left rear corner of the cover. Failure to do so
may pinch or damage the hose causing fuel leakage
or a driveability concern.
(4) (Refer t o 14 - F UE L SYSTE M - WARNING).
St a r t en gin e, a llow t o r u n for a few m in u t es, t u r n t h e
en gin e off a n d in spect for lea ks.
FU EL PU M P
DESCRI PT I ON
DESCRIPTION - HIGH PRESSURE PUMP
WARNING: (Refer to 14 - FUEL SYSTEM - WARN-
ING)
Th e h igh pr essu r e pu m p is a fu el r egu la t ed r a dia l
pist on pu m p wit h t h r ee pist on s a r r a n ged a t a n a n gle
of 120°. Th e r egu la t ion bein g ca r r ied ou t by t h e fu el
qu a n t it y va lve. Th e h igh pr essu r e pu m p is dr iven a t
a bou t 1.3 t im es t h e speed of t h e ca m sh a ft . Specific
m ovin g pa r t s in side t h e pu m p a r e gr a ph it e coa t ed t o
a ssist wit h t h e lu br ica t ion pr ocess du r in g oper a t ion .
Th e h igh pr essu r e pu m p is m ou n t ed t o t h e fr on t of
t h e cylin der h ea d a n d m u st be r epla ced a s a n a ssem -
bly sh ou ld a fa ilu r e occu r (F ig. 5).
Fig. 5 HIGH PRESSURE FUEL PUMP
1 - HIGH PRESSURE PUMP
2 - FUEL SUPPY TO FUEL RAIL
3 - FUEL SUPPLY LINE
4 - FUEL RETURN LINE
5 - FUEL TEMPERATURE SENSOR
6 - FUEL QUANTITY CONTROL VALVE
7 - OIL LEVEL INDICATOR
8 - VACUUM PUMP
DESCRIPTION - LOW PRESSURE PUMP
Th e elect r ic fu el pu m p is loca t ed in t h e fu el t a n k.
Th e pu m p dr a ws wa r m or h ot fu el fr om t h e fu el t a n k
m odu le bowl a n d a lso dr a ws cool fu el ou t of t h e t a n k.
Th e cool fu el is dr a wn in a n d is m ixed wit h t h e fu el
a lr ea dy in t h e bowl in a 50–50 m ix r a t io. Refer t o
fu el pu m p m odu le for ser vicin g (Refer t o 14 - F UE L
SYSTE M/F UE L DE LIVE RY/F UE L TANK MODULE
- RE MOVAL).
OPERAT I ON
OPERA TION
LOW PRESSURE SIDE
Th e fu el su pplied by t h e low pr essu r e pu m p flows
t h r ou gh t h e fu el su pply (5) a t t h e h igh pr essu r e
pu m p a n d is pa ssed t o t h e fu el qu a n t it y va lve (11)
a n d t h e fu el pr essu r e r elief va lve (9). An y a ir
en t r a in ed by t h e fu el is dir ect ed t h r ou gh t h e r est r ic-
t or (10) t h r ou gh t h e bleed por t (7) t o t h e r et u r n flow
(6). Th e qu a n t it y con t r ol va lve (11) con t r ols t h e
a m ou n t of fu el t h a t flows a lon g t h e r in g pa ssa ge (4)
t h r ou gh t h e su pply por t s t o t h e t h r ee h igh pr essu r e
pu m p elem en t s. To lu br ica t e t h e plu n ger a n d ba r r el
a ssem blies wh en t h e qu a n t it y con t r ol va lve is closed

FUEL DELIVERY 14 - 13