(4) Fill fuel ta nk with fr esh diesel fu el.
(5) Drain and rem ove the fu el filter. (Refer to 14 -
FUE L SYSTEM/FUEL DE LIVERY/FUEL FILTE R /
WATER SE PARATOR - RE MOVAL)
(6) In st all a new fuel filter. (Refer to 14 - FUEL
SYSTEM/FUEL DELIVERY/FUEL FILTER / WATER
SE PARATOR - INSTALLATION)
(7) Check t he engine control module for any diag-
nostic tr ouble codes (DTCs). Record and clear any
DTCs t h a t a r e pr esen t .
(8) St art and run the en gine. Ru n th e engine for
up to 15 minutes to a llow time for an y DTCs to reset
and shu t off the engine.
(9) Check t he engine control module for any diag-
nostic trouble codes (DTCs). Record any DTCs that
are present. Refer to t he appropr iate en gine electr ical
diagnostics to dia gnose a ny DTCs that were set.
CAUTION: With the high pressure fuel system in
this vehicle, any residual contaminated fuel will be
removed very quickly. Shut off the engine immedi-
ately if signs of engine damage are noted.
The engine should th en be evaluated to deter mine
if th e contam inated fuel has caused any da mage t o
the fu el syst em and/or engine. Indicator s t hat t he
fuel syst em has been dam aged in clude the following:
• Unstable fuel rail pressure. This can man ifest
itself as instability of idle speeds, excessive under-
sh oot/over sh oot at engine start-u p, or excessive
undershoot/overshoot wh en the engine operatin g con-
ditions chan ge. A typical engine response to a la rge
rail pressu re undershoot would be a decrea se in
engine speed or engine stall.
• Excessive noise fr om the en gin e. Th is could indi-
cate poor rail pr essu re control or the inability of t he
injection system t o inject the proper am ount of fu el.
• Excessive smoke (bla ck or whit e). This could
indicate the inability of the fuel system to inject th e
pr oper amount of fuel.
NOTE: If any of these conditions are exhibited after
cleaning the fuel system, proceed to the appropri-
ate engine electrical diagnostic information. Repair
the fuel system and/or engine as necessary.
SPECI FI CAT I ON S
TORQUE
DESCRIPTION N·m Ft. Lbs. In. Lbs.
FUEL TANK MOUNTING NUTS 15 - 17 11 - 13 -
FUEL TANK MODULE LOCKRING (LOCK-
NUT)
60 44 -
PRESSURE CONTROL VALVE NUT TO
FUEL RAIL (2 STAGES)
60, loosen 90°, re-
tighten to 80
44, loosen 90°, re-
tighten to 59
-
SPECI AL T OOLS
FUEL SYSTEM
SPECI AL T OOL CROSS REFEREN CE CH ART
MB
TOOL #
MILLER
TOOL #
DESCRIPTION
N/A 5069-2 FUEL GAUGE
N/A 6856 SPANNER WRENCH
N/A 9068 FUEL GAUGE ADAPTER
N/A 9285 FUEL LINE WRENCH
SPANNER WRENCH-6856
VA FUEL DELIVERY 14 - 9
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