• Tigh ten the nut to 60 N·m (44 ft. lbs.)
• Loosen the n ut 90 degrees.
• Retighten the nut to 80 N·m (59 ft. lbs.).
(3) In st all fuel r ail (Refer to 14 - FUEL SYSTEM/
FUE L INJ ECTION/F UEL INJ ECTOR - INSTALLA-
TION).
(4) Connect nega tive bat tery cable.
(5) St art engine, allow to warm , t urn en gin e off
and inspect for leaks (Refer to 14 - FUEL SYSTEM -
DIAGNOSIS AND TESTING).
FU EL T EM PERAT U RE SEN SOR
DESCRIPTION
The fuel tem perat ure sensor is integra ted in th e
high pressur e fuel pump n ext to the fuel qua ntity
valve. The sensor det ects the t empera ture of the fuel
and su pplies tha t information to the ECM. Th e sen-
sor r anges from - 40°F (- 40C) to 284°F (140°C). If
the engine is cold, the a ctual va lue sen t will rea d
ambient tempera ture. The value r ises after th e
en gin e h a s been st a r t ed.
OPERATION
An negative temper atu re coefficient (NTC) resistor
integra ted in t he fuel tempera tur e sensor a lter s it’s
electrical resist ance in line with the fuel tempera ture
(the resistance dr ops as th e tempera ture r ises). The
ECM uses this rea ding to calculate optim um en gine
performance under all dr iving condition s. If th e fuel
is to wa rm, t he ra il pressu re in t he system is low-
ered. Th e controller quantity of th e pr essu re regulat-
ing valve is reduced and th e fuel temperature is
lowered.
REMOVAL
NOTE: Capture and properly store all fluid seepage
in appropriately marked containers.
(1) Disconn ect the n egat ive battery cable.
(2) Remove the fuel temper atur e sensor fr om the
high pr essure pu mp (Fig. 19).
INSTALLATION
(1) Clean sea ling surfa ces.
(2) In st all new seal on sen sor.
(3) Scr ew th e sensor in to th e high pressur e pump
and tight en to 18 lbs.ft. (25 N·m) (F ig. 19)
(4) Connect nega tive bat tery cable.
(5) St art en gin e, a llow to warm , shu t engine off
and inspect for leaks (Refer t o 14 - FUEL SYSTEM/
FUE L INJ ECTION - WARNING).
INTAKE AIR TEMPERATURE
SEN SOR
DESCRIPTION
The in take air tem perature sensor is located
between the charge air pipe and t he charge air dis-
tribution of the cylinders. The in take air temper ature
sensor mea su res the temper ature of the air as it is
su pplied to th e cylinders and tr ansmits the v a lue to
the ECM. This is requ ired in order t o determine the
density of the a ir being supplied for the combustion
pr ocess. The value ra nge is from minus 40°F up to
302°F (minus 40°C to 150°C).
Fig. 19 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
14 - 42 FUEL INJECTION VA
To Next Page
Loading...
