Haltech E6GMX - Manual (Page 47)

E6GMX Manual
47
4.5.4 Ignition Correction Maps
The following is an explanation of maps that are used to correct the base ignition timing based
on the environmental conditions.
4.5.4.1 Coolant Temperature Correction
The coolant temperature correction map is accessed through the menu structure and can be
found in the maps menu.
The coolant temperature correction map is used to adjust the ignition timing based on the
coolant temperature measured by the ECU. The map has 32 bars distributed across coolant
temperature in the range –40°C to 127°C and each bar represents an angle correction to the
current calculated ignition angle.
4.5.4.2 Air Temperature Correction
The air temperature correction map is accessed through the menu structure and can be found
in the maps menu.
The air temperature correction map is used to adjust the ignition timing based on the air
temperature measured by the ECU. The map has 32 bars distributed across air temperature in
the range –40°C to 127°C and each bar represents an angle correction to the current
calculated ignition angle.
4.5.4.3 Coolant Temperature cranking map
The coolant temperature cranking map is accessed through the menu structure and can be
found in the maps menu.
The coolant temperature cranking map is used to apply a set ignition angle based on the
coolant temperature measured by the ECU at engine speeds below 380rpm, which are
considered to be cranking speeds. The map has 32 bars distributed across coolant temperature
in the range –40°C to 127°C with each bar representing the corresponding ignition angle.
4.5.5 Zero Throttle Map
The zero throttle map is accessed through the menu structure under the maps menu.
The zero throttle map is used with engines that use Manifold pressure load sensing but cannot
produce a stable manifold pressure signal at idle. The zero throttle map is used when the
throttle position reads 0% and applies a set amount of fuel in place of the fuel quantity
normally extracted for the base fuel map. The map has 16 bars distributed across engine
speed in the range 0rpm to 2000rpm and each bar represents a quantity of fuel measured in
milliseconds.
4.5.6 Full Throttle Map
The full throttle map is accessed through the menu structure under the maps menu.
The full throttle map is used with engines that use Manifold pressure load sensing but cannot
produce a stable manifold pressure signal at full throttle. The full throttle map is used when
the throttle position reads higher than “Full Throttle Threshold” (refer to 4.2.2 Fuel Set-up
Page, p29) and applies a set amount of fuel in which the ecu will inject, regardless of the fuel
quantity normally extracted for the base fuel map. The map has 32 bars distributed across
engine speed in the range 0rpm to 16000rpm and each bar represents a quantity of fuel
measured in milliseconds.