Okay, I talked to a Ford Technician today, an acquantance of mine. Here Goes:
The fuel tables for open loop are locked. Adaptive strategy is a survival feature. Adaptive Strategy or KAM (Keep Alive Memory) is a correction factor added to the table that the computer uses to compensate for the engine aging and degradation of the fuel system components. It allows the computer to add to the pulse width of the injectors in case the injectors are partially clogged or if the motor needs more fuel. If the injectors are flushed it will adjust and go back to the base settings in the table that is set from the factory, the computer can only add extra pulse width, not take it away. (after all if it did then there would be no sense in upping your fuel pressure because the pulse width would shorten)This he showed me from the ford technician manual.
He went on to say that that is why we are able to calculate ideal fuel pressures when we know how much power we are making and get a close match, further tuning should be done on a wideband sensor. Also he said that the factory lists the safe operating pressure range as 30-40psi.
|