2003 Ford Excursion Diesel Supplement 2nd Printing - Page 5

2003 Ford Excursion Manual

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Diesel information Fast start glow plug system The glow plug system consists of: • eight glow plugs • the glow plug control module (GPCM) • engine oil temperature (EOT) sensor • barometric pressure (BARO) sensor The glow plug system is electronically controlled by the PCM. The GPCM energizes the glow plugs immediately after the ignition is placed in the ON position, then determines how long the glow plugs will be on according to the EOT and BARO sensors. The required time for the glow plugs to be energized decreases as the engine oil temperature and barometric pressure increase. Engine cooling system The cooling system contains an engine oil cooler which is mounted in the center valley of the engine. The cooler's function is to regulate engine oil temperature. Engine governed speed The engine governor is controlled by the PCM. The PCM controls fuel input to limit maximum engine speed. It will not, however, prevent engine overspeeding resulting from downshifting at high vehicle speed or by descending steep grades at too high a vehicle speed for the selected transmission gear. For maximum vehicle speed in various gears, refer to Manual transmission shift speeds in the Driving tips chapter. Do not exceed 3,600 rpm. Maximum engine governed speed is 4,000 rpm depending on engine load. Excessive rpm can only be achieved by manually downshifting at too high of a vehicle speed. Operating the engine beyond the governed speed can cause severe engine damage. 5

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Fast start glow plug system
The glow plug system consists of:
•
eight glow plugs
•
the glow plug control module (GPCM)
•
engine oil temperature (EOT) sensor
•
barometric pressure (BARO) sensor
The glow plug system is
electronically controlled by the
PCM. The GPCM energizes the glow
plugs immediately after the ignition
is placed in the ON position, then determines how long the glow plugs
will be on according to the EOT and BARO sensors. The required time
for the glow plugs to be energized decreases as the engine oil
temperature and barometric pressure increase.
Engine cooling system
The cooling system contains an engine oil cooler which is mounted in the
center valley of the engine. The cooler’s function is to regulate engine oil
temperature.
Engine governed speed
The engine governor is controlled by the PCM. The PCM controls fuel
input to limit maximum engine speed. It will not, however, prevent
engine overspeeding resulting from downshifting at high vehicle speed or
by descending steep grades at too high a vehicle speed for the selected
transmission gear.
For maximum vehicle speed in various gears, refer to
Manual
transmission shift speeds
in the
Driving tips
chapter. Do not exceed
3,600 rpm. Maximum engine governed speed is 4,000 rpm depending on
engine load. Excessive rpm can only be achieved by manually
downshifting at too high of a vehicle speed.
Operating the engine beyond the governed speed can cause
severe engine damage.
Diesel information
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