Editing Tuning Tables

Opening a table or curve

Tuning tables and curves are accessed through the Configuration section of the sidebar. The menus are generated from the ECU definition file, so the exact layout depends on your ECU.

Common tables include:

• VE Table — volumetric efficiency by RPM and load (the main fuelling map)
• Ignition Advance — timing by RPM and load
• AFR Targets — target air-fuel ratio by RPM and load
• Cranking Enrichment, Warmup Enrichment, Accel Enrichment — transient corrections

Editing cells

Click any cell in a table to select it. You can then:

• Type a new value and press Enter to commit
• Use arrow keys to move between cells
• Hold Shift and click to select a range, then type to set all selected cells to the same value

The heat map colour coding updates as you edit, giving immediate visual feedback.

Burning to the ECU

Any change you make in the table editor is held in memory. To write changes to ECU flash memory, click Burn to ECU in the sidebar. Burning is required for changes to persist after the ECU is powered off.

Warning: burning writes to non-volatile flash. Always keep a backup MSQ file before making significant changes.

Saving to a file

Use Connection Setup → Save MSQ file to export the current tune as an MSQ file. MSQ files are compatible with TunerStudio and other Megasquirt tools.

Undo

Cell edits can be undone with Ctrl+Z. There is no limit to the undo history within a session.