the throttle position in conjunction with RPM is used to calculate engine vacuum. It is a bit more
difficult to tune but can be done. A disadvantage is that it cannot compensate for sea level
correction. The TPS is calibrated as normal to allow the tuner to make use of the full graph. Then
the TPS signal is projected in the Map sensor’s graphs.
6.7.3.2 Accelerator Pump
The accelerator pump setting is used to richen the fuel mixture when accelerating to avoid flat
spots or bog. Here you can select not to use it, use either the TPS or MAP or both.
The Accelerator pump settings are done for Both the MAP and TPS sensors.
Enrichment % - Use the slider to richen the fuel by a given percentage when accelerating. A
standard is 40 or 50%.
Sensitivity - Set this slider from 1 to 10, starting at 10 for the least sensitive, until you are
comfortable with the response you get out of your acceleration. If the setting is too sensitive (1),
then your car will jerk and over fuel with the slightest movement of the throttle. Tune this setting
from a flat spot side till it’s gone. Otherwise you may over fuel without knowing it. A standard is 2
to 4.
Max RPM – This is the maximum RPM that the pump settings will be active. At high RPM you do
not need an accelerator pump. A standard is 1500 to 2000 RPM.
6.7.3.3 Fuel Map
These limits are used to select between the four RPM fuel correction maps. They are displayed on
the vacuum map as three blue arrows. When the vacuum signal passes these arrows, a different
RPM correction map is used.
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