Haltech E8 - Manual (Page 83)

Haltech E11/E8 Instruction Manual
Figure 86 - Target AFR Map
With a correctly configured wideband O2 sensor input and the target AFR map set to the desired air to
fuel ratio the quicktune feature is ready to be used. To use the quicktune feature open the fuel map, with
the fuel map open pressing the “Q” key on the keyboard activates quicktune and adjusts the fuel map
value for the current load point the engine is operating at. The ECU does this by comparing the actual
AFR as measured by the wideband O2 sensor to the desired AFR as set in the target AFR map, the
difference between these two values is added or subtracted from the value in the fuel map until the
desired AFR is reached.
It is important to note that when the Q button is pressed the ECU only makes an adjustment to the load
and RPM point the engine is actually operating at regardless of the number of mapping points you may
have selected. For this reason best results are achieved when the RPM and load points are in the middle
of a map cell when the Q key is pressed.
Tapping the Q button multiple times in quick succession will yield poor results as the system relies on
accurate feedback from the wideband O2 sensor.
Pressing the 'W' key copies the calculated quicktune map value into the next load bar to the right of the
adjusted load bar and the same two corresponding bars in the next RPM range.
Copyright © Haltech 2008 Page: 83