Hi mentors,

Frequently, you hear people say that it is much easier to adapt HHO to a car without gas oxygen sensor (O2 / AF) that modern cars are equipped with the types of sensors.

And if the oxygens sensors were eliminated from the equation in modern cars?

A bit of theory ...

When in open loop, the ECM Does not use the oxygen sensor A / F sensor adjusted to the injection duration.

The ECM Will Be in open loop mode when:
- Starting the engine
- The engine is cold
- Hard acceleration
- DURING fuel cut-off
- Wide open throttle
- No response from O2 sensor or A/F sensor (CEL)

Short Fuel Trim si not Used When The ECM Is in OPEN LOOP mode. However, since Long Fuel Trim IS Stored in the ECM's memory and it's not erased. The Long Fuel Trim affect injection duration in closed and open loop mode.



In your opinion, would it be possible to disconnect (or failed to) one of the oxygen sensor to force the ECM to switch to OPEN LOOP MODE. It would be important to ensure that the Long Fuel Trim has a negative value at the time to force OPEN LOOP (CEL). In this way, the ECM no longer be using the information from oxygen sensors to adjust the injection time. To compensate for the fact that most would use the Short Fuel Trim, we could decrease the value of the MAP sensor (less load = less fuel consumption) and increase the values ​​of IAT and ECT sensors (higher = less temperature 'fuel injection timing and late)


Have you ever tried it, what do you think about that ?

Regards
Remi