Thread: Gas Injection just fitted to my 95 V8 Disco and its not running at all

Originally Posted by SPROVER

Thats what the guy told me.That it is just a work around before it is tuned.
I think from what i remember he told me, was that he wants to tune it via the oxy sensor.I didnt ask if it was via the petrol ECU or via the gas ECU.Would it make a difference either way? Would it work the same if it was set up only on the gas ECU?

Oxy sensor wired to the gas ECU allows the tuner to manually adjust the mixtures in the programming. It doesn't self-tune. Still a good idea.

Oxy sensors wired to the petrol ECU require some fancy rewiring and genuine sensors. It has been done, not too hard. A couple of people (at least) on this forum have done it , including Pibby. This method is the best as the ECU will self-tune both fuels at closed loop operation, that is mainly under cruising, warm to hot engine conditions.

In a similar situation to yours, I have just fitted an injection system to a 2.7 Hilux which surprised me by not having an oxy sensor, despite being an '04 model with a cat converter. I had to tune it manually, and it required me to massage the numbers in the gas ECU during a test drive. I just carefully richened it up until it didn't sag under light load. I will see how the economy goes when the customer reports back.