And, in that, again you are wrong.
You seem to think that I don't understand exactly what the FCA is. Its a valve, nothing more, nothing less.
Duty cycle is nothing more than the time that valve is allowed to remain open to meet the fuel demand.
Only reason to increase duty cycle on the FCA is to meet demand for rail pressure. THAT is what is measured. MEASURED, NOT METERED, which is what the FCA does.
So, like I said, we're both seeing the same thing, you just seem to think that duty cycle is an estimation of volume, when its not. Is it allowing a greater VOLUME of fuel to flow with increased duty cycle? Yes, thats a given. If the valve is open longer, you get a greater volume of fuel through it.
The ONLY reason to increase that duty cycle is if your not able to maintain pressure. That's it. If your logs are showing pressure is being maintained, then what you're going to see is commanded duty cycle greater than actual. If the commanded and actual are the same, you're likely seeing rail pressure drop off and THAT is when you increase that duty cycle.
The base duty cycle is just that, the BASE table. All its doing is telling the FCA how much to open. If the duty cycle is too low, you don't maintain pressure.
So, exactly what don't I understand.