MAP / MAF Sensor Enhancer
Modern fuel-injected petrol engines use Mass Airflow (MAF) or Manifold Absolute Pressure (MAP) sensors to calculate injector pulse width. When HHO gas improves combustion efficiency, the ECU may compensate by increasing fuel injection to maintain the stoichiometric ratio — partially negating the fuel savings.
The MAP/MAF sensor enhancer modifies the signal from these sensors to recalibrate the ECU, allowing the engine management system to accept the efficiency improvement and reduce fuel delivery accordingly.
When It's Required
- Modern petrol fuel-injected vehicles (post-2000)
- Vehicles that show reduced fuel savings after initial installation
- Vehicles where the ECU throws fault codes after installation
Not Required For
- Diesel engines (open loop injection timing)
- Older carburetted petrol engines
- Vehicles showing expected fuel savings without the enhancer
Installation
The enhancer is installed in-line between the MAP/MAF sensor and the ECU. Adjustment is made using the trim potentiometer — typically 5–15% signal reduction is required. Fine-tune by monitoring fuel consumption over 2–4 weeks.
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