The voltages are very different and I think even the number of wires is different. So different circuitry and programming is required. The Emerald ECU can be configured to use either type or none at all.
I wish we had a local Tuner who knew the Emerald, the thing is over my head.
There's nothing unique or bespoke to Emerald - it just uses good, sound technology and provides a compentent ECU tuner the facilities to achieve the desired results. Anyone experienced in setting up programmable ECU's should be able to fly Emerald. They are very good indeed and are just what we need to circumvent the increasing restrictions coded into OEM kit these days.
FWIW, an increase in Fuel Pressure is probably not an ECU-monitored condition, so if an injector is opened for the programmed Duty time, then more pressure in the rail will produce more fuel injected. As explained above, the Narrow Band Lambdas will simply smell what they get given and call for adjustments as required. There's actually every chance that increasing fuel pressure will help alleviate the potential weak running, but as Chris says earlier, what you need is a reprogrammed map for Stage-2 and leave the fuel pressure as stock.
