Tool · Simulators

ECU Remap Simulator

Explore simplified relationships using synthetic example maps. This exercise does not predict a real vehicle or recommend real-world adjustments.

Educational simulation using synthetic example data

This does not read an ECU or model a specific vehicle. Tables, scenario names and faults are examples; the rounded outputs use simplified arithmetic and cannot predict real power, torque, fuel use, emissions, reliability or safety.

Choose an example

Synthetic scenarioTable presetSynthetic mapFault example

The 6 × 6 example tables are generated from fixed base values and row/column increments. Presets multiply those values by 0.9, 1.0, 1.1 or 1.2 and round to whole numbers. “Example A/B/C” are not vehicle identities.

Synthetic Fuel Map values — simulation range 0–200
RPM \ Load (%)	0	20	40	60	80	100
1000	Fuel Map, 1000 RPM, 0% load	Fuel Map, 1000 RPM, 20% load	Fuel Map, 1000 RPM, 40% load	Fuel Map, 1000 RPM, 60% load	Fuel Map, 1000 RPM, 80% load	Fuel Map, 1000 RPM, 100% load
2000	Fuel Map, 2000 RPM, 0% load	Fuel Map, 2000 RPM, 20% load	Fuel Map, 2000 RPM, 40% load	Fuel Map, 2000 RPM, 60% load	Fuel Map, 2000 RPM, 80% load	Fuel Map, 2000 RPM, 100% load
3000	Fuel Map, 3000 RPM, 0% load	Fuel Map, 3000 RPM, 20% load	Fuel Map, 3000 RPM, 40% load	Fuel Map, 3000 RPM, 60% load	Fuel Map, 3000 RPM, 80% load	Fuel Map, 3000 RPM, 100% load
4000	Fuel Map, 4000 RPM, 0% load	Fuel Map, 4000 RPM, 20% load	Fuel Map, 4000 RPM, 40% load	Fuel Map, 4000 RPM, 60% load	Fuel Map, 4000 RPM, 80% load	Fuel Map, 4000 RPM, 100% load
5000	Fuel Map, 5000 RPM, 0% load	Fuel Map, 5000 RPM, 20% load	Fuel Map, 5000 RPM, 40% load	Fuel Map, 5000 RPM, 60% load	Fuel Map, 5000 RPM, 80% load	Fuel Map, 5000 RPM, 100% load
6000	Fuel Map, 6000 RPM, 0% load	Fuel Map, 6000 RPM, 20% load	Fuel Map, 6000 RPM, 40% load	Fuel Map, 6000 RPM, 60% load	Fuel Map, 6000 RPM, 80% load	Fuel Map, 6000 RPM, 100% load

Edit a whole-number cell from 0 to 200. This is an interface range for the example only, not a real tuning limit.

Ready to run a simulation.

Browser-local example profiles

Profiles store the selected example name and all five 6 × 6 tables in this browser’s localStorage. They contain no vehicle file. Resetting the simulation does not delete saved profiles.

Profile nameSaved profile

How to use this learning example

Choose a synthetic scenario and table preset, then inspect or edit one of its example maps.
Select “Run simulation” to calculate rounded outputs from simple ratios of map sums. Changing a control clears old outputs.
Select a simulated fault example to see how a scenario warning is presented. It does not inspect maps or diagnose an ECU.

The arithmetic treats map types as independent factors and should not be read as an engineering model. Map labels and values are simplified teaching aids; actual ECU strategies, units, axes and interactions vary. No output establishes that a calibration is suitable, safe, emissions-compliant or reliable.

Continue learning

ECU remapping fundamentals
Map scaling concepts
Checksums and validation
Working with raw ECU files
Inspect a byte table with Map Viewer (this does not create a real tuning workflow).

What the simulation changes and shows

Choose a synthetic scenario and profile, edit example table cells, and optionally select an example fault label. After you run it, the simulator compares totals from the edited tables with the selected scenario’s baseline tables and uses simplified ratios to calculate displayed example outputs and warnings.

All scenarios, tables, labels and results are synthetic. The simulator does not read a vehicle or ECU file, model a particular vehicle, diagnose a fault, or validate calibration, compatibility or safety. Read What the Hex Labs ECU Remap Simulator Actually Simulates for the model details and limits.