[Dark Sun]

Originally Posted by gtstorey

Your measurements are not measurements, they are approximates from models, especially fuel flow. There is no fuel flow measurement. The whole secret to tuning is to get those models to match changes you introduced by changing things.

Even if your fuel flow was actually measured, it would be about impossible for it to be accurate enough to get you a number accurate enough to give you a useful calculation.

Ok so I have to ask, if there is no fuel measurement, why does the scanner show fuel pressure, commanded fuel pressure, injector flow, and how does the ECM in open loop know how much fuel to meter into the engine based on MAF to maintain an AFR from the factory without a wide band sensor?