MAP Correction

This table controls additional fuel against Manifold Pressure. 

When the Tuning Method is Volumetric Efficiency, the ECU is already compensating for Manifold Pressure and therefore this table is treated as an additional correction. Before tuning commences this table should be set to 0%.

It is common to see values in this table when using TPS as the fuel load source once the engine starts to lose efficiency with additional manifold pressure or pumping losses.

• Related Articles

• MAP Prediction / Fuel Film Model

  The MAP Prediction / Fuel Film Model allows the ECU to calculate the dynamic fuel delivery requirements of your engine during transient events such as rapid throttle movements and quick changes in load. This is actually two functions rolled into one ...

• Barometric Correction

  The Fuel Barometric Pressure Correction Table is used to correct engine fueling based upon atmospheric barometric pressure. The number in each cell of the above table represents a percentage change in fuel output for a given represented barometric ...

• Ignition Tuning

  Ignition Tuning Ignition Angle Lock Mode Allows the ignition advance to be fixed at a determined value to allow calibration of the TDC Offset. All ignition tables and corrections are ignored when this is active, and the ignition advance will not ...

• Tuning Base Tables

  Tuning Method  Injection Time  The fuel table contain the base injection time for the given load and RPM at which the engine is operating. The base fuel map has the greatest influence on the air/fuel (A/F) mixtures.  With injection time tuning, you ...

• Short and Long Term Fuel Trim

  One of the great things about tuning in volumetric efficiency mode is that once the fuel system is set up correctly the engine almost tunes itself – and that’s exactly what we are going to look at in this article.  If you’re not familiar with the ...