Fuel and turbocharger cooling system (F-Super Duty only)
The fuel and turbocharger cooling system contains a cooler which is
mounted on the turbo interstage U-tube on the left side of the engine.
The cooler’s function is to regulate engine fuel temperature and cool the
electronics that support the turbocharger. You may hear the auxiliary
coolant pump running up to 10 minutes after the ignition is turned off in
hot weather or if you are towing heavy loads. This is to control the
temperature of the turbocharger.
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.
If your vehicle is equipped with a manual transmission,
refer to
Manual transmission shift speeds
in the
Driving
chapter of your
Owner’s Guide
for maximum vehicle shift speeds in various gears. Do
not exceed 4,000 rpm. Maximum engine governed speed is 3,700 rpm.
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.
Speed control (F-Super Duty)
If vehicle speed goes outside a predetermined range from the set speed,
the RES (Resume) function will not reset vehicle speed. Vehicle speed
will need to be reset with the SET +/- button after reaching desired
speed using accelerator pedal.
2009 Econoline
(eco)
Supplement, 1st Printing
USA
(fus)
Introduction
6
