6.3 Tuning fuel 6 TUNING THE MS3PRO
The two curves are the primary tuning tools. They set the percentage of pulse width to add as a function of
the rate of change of MAP and TPS readings. The adder % is a percentage of the main Required Fuel number.
Under these charts, you can set a percentage to blend MAP and TPS driven acceleration enrichment. 100% is
entirely TPS driven, and 0% is entirely MAP driven. In between, the percentage will scale the MAP driven pulse
width adder down and the TPS driven pulse width adder up.
Unlike accelerator pump AE, which stops when the throttle position or MAP sensor stops moving, this mode
will activate the acceleration enrichment for a defined time when the threshold rate of change occurs.
Below that, you have a line graph that appears when the engine is running. It tracks the air/fuel ratio, MAPdot,
and TPSdot measurements to help you tune the acceleration enrichment.
Here are what the settings do.
• Accel MAPdot threshold: The minimum MAPDot level needed to trigger MAP driven acceleration enrich-
ment. Increasing this number will decrease false triggering from a noisy MAP signal, but too much will mean
you miss triggering acceleration enrichment at lower amounts of tip in.
• End pulse width: The amount of pulse width at the end of the acceleration event, as a percentage of
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 116
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