Haltech E6A - Manual (Page 36)

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4.3 Using the Software
In order to make the software easy to use, the programme presents you with a menus bar at
the top of the display. The menu bar is accessed through simple combinations of key strokes.
Once the appropriate menu has been accessed a sub-menu appears giving choices on available
page heading. To increase efficiency there is also a number of hot-keys that allow you
movement between pages without accessing the menu bar.
4.4 Accessing the fuel maps
Pressing
¦m ¦m
will take you to the Maps Menu. From the Sub-menu choose the fuel maps
option. By using the cursor keys to move the highlight bar or pressing the underlined letter of
the option required in the case
F F
. This will produce a further sub-menu that will allow you
to choose a range to be viewed.
4.4.1 Fuel Setup
The Fuel Setup works in an identical way to the Identification. It’s fields are different and
relate to the way the fuel is delivered to the engine. Enter the Fuel Setup by pressing
¦s ¦s
and then by pressing
F F
key. The fields in the Fuel Setup are:
Ign / By: Ignition Divide By is the number of ignition pulses that will be counted until the
next injection pulse. For almost all multipoint systems, injection should occur once per
revolution and so Ignition Divide By should be set to half the number of cylinders. If
the system is operating in Batch Fire or Sequential mode, or is a rotary, then a value of
1 is suggested.
Decel Cut-Off: A common fuel saving feature in original equipment computers is a fuel cut-
off on deceleration. This will cut fuel delivery to the engine while coasting down hills
with closed throttle. This feature can be enabled or disabled on the E6A. It is better,
when first tuning, to disable this function.
Injection Mode: The E6A splits its four injector driver outputs into two banks. INJ1 and
INJ2 comprise the first bank. INJ3 and INJ4 form Bank 2 (refer to the wiring diagram
at the back of this manual.) In Basic Mode, Fuel can be injected in three different
modes.
Multipoint injection fires all the injectors together. This is the most common setup and
will normally be used on engines with multipoint injection manifolds (one injector per
cylinder).
Batch-fire injection is usually used in throttle body or non-turbo rotary setups 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 pulsing together.