Manual
29
The valid values for this parameter are: 1, 2, 3, 4, 5 and 6
Decel Cut-Off
A common fuel saving feature in origin al equip ment computers is a fuel cut-off on
deceleration. This will cut fuel delivery to the engine while coasting down hills with a
closed throttle. This feature can be enabled or disabled on the F10. It is better, when
first tuning, to disable this function.
The valid values for this p arameter are: Enable and Disable
Injection Mode
Depending on the ECU settings the F10 splits its four (F10 and F10A) or eight (F10-8
and F10A-8) injector driver outputs into two banks (see chapter 13, 13.1). INJ1 and
INJ2 comprise the first bank. INJ3 and INJ4 form Bank 2. The fuel can be injected in
three different modes.
Multipoint injection f ires all the injectors together. This is the most co mmon set-up
and will normally be used on en gines with multipoint injection manifo lds (one in jector
per cylinder).
Batch-fire injection is usually used in throttle body or non-turbo rotary set-ups and
fires the two banks of injectors alternately. On eight and twelve injector fuel rails, with
high-flow injectors, this may also help reduce fuel pressure oscillations caused by all
injectors p ulsing together.
Staged injection is usually used on high boost turbo engines. Injector Bank 1 fires all
the time, just as in a multipoint set-up. Beyond a set boost pressure, the second bank
of injectors is enabled. These "staged" injectors are normally up stream of the p rimary
injectors, addin g to their fuel flow. The p oint at which the F10 switches in the
secondary injectors is set via the Staging Bar Number field. Staging permits high fuel-
flow capability, but maintains accuracy and controllability at light load and idle.
(Refer C.3 Injector Staging, 90).
WARN ING:
WHEN FINISHED SETTING THE INJECTION MODE, SEE
CHAPTER 13.1
(INPUT/OUTPUT PAGE) TO S ET THE INJ 1 - 4 DRIVERS TO THE
CORRECT STATE: ENABLED OR DISABLED:
THIS IS IMPORTANT AS THE ECU WILL NOT OPERATE
CORRECTLY IF THE INJ 1-4 DRIVERS HAVE NOT BEEN
CONFIGURED P RO P ERLY. AT WO RS T, SO ME INJ ECTORS MAY
NOT FIRE OR THE INJECTOR DRIVERS MAY DESTRUCT AFTER
A PERIOD OF TIME.
F10 AND F10A ONLY
THE F10 AND F10A ARE NOT CAPABLE OF DRIVING 8 LO W
IMPEDANCE INJECTORS. THESE ECU DO NOT HAVE THE
EXTRA INJECTOR DRIVERS MENTIONED ABOVE.










