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DESCRIPTION & OPERATION
Fuel Temperature Sensor
On early-production engines with a right-side
mounted EECU, a fuel temperature sensor is
provided at the top of the secondary fuel filter
mounting adapter (Figure 15) installed in a boss
adjacent to the outlet fitting. The V-MAC III
system monitors fuel temperature at the
secondary fuel filter outlet, as fuel is being
supplied to the cylinder block fuel gallery inlet.
This fuel temperature data improves accuracy of
the mpg fuel consumption information shown on
the Co-Pilot
®
display.
The fuel temperature sensor is the same as the
coolant temperature sensor used at the rear of
the water manifold location. The illustration that
follows shows a CH/CL/DM engine-mounted, fuel
filter adapter. The RD/MR/LE chassis-mounted
secondary fuel filter mounting adapter has a
similar sensor mounting boss. In either case, if
the fuel temperature sensor is not used, the boss
should not be drilled and tapped.
15
Figure 15 — Fuel Temperature Sensor (Engine with
Right-Side Mounted EECU)
On current-production engines with the left-side
mounted EECU, the fuel temperature sensor is
located at the fuel cylinder block fuel gallery inlet
(Figure 16). This location is standardized for all
fuel filter arrangements, simplifying and
improving the line routing.
16
Figure 16 — Fuel Temperature Sensor (Engine with
Left-Side Mounted EECU)
1. Fuel Temperature Sensor
2. EUP Heat Shield
5_106_00.bk Page 22 Friday, August 4, 2000 11:17 AM
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