Keith Browning Posted January 17, 2010 Share Posted January 17, 2010 it is interesting that the fuel injectors in this engine have a flow and calibration code that must be entered into the PCM. I know Caterpillar engines are big on this. It adds a new level of complexity to the engine and our jobs. I wonder what concerns will develop and how difficult it will be to diagnose a situation where an incorrect code is entered or the injectors get mixed up. Does anyone know if the new fuel strategy is using short term fuel trims? I expect a mix up would show up there. Quote Link to comment Share on other sites More sharing options...
Cetane Posted January 17, 2010 Share Posted January 17, 2010 The IQA codes are used to correct injection quantity per cylinder and as an aid to help the system understand how far each injector is drifting as time passes. The code supposedly indicates how much the injector flowed at some condition(s) when new. If the ECU knows that value then it can calculate drifting and individual correction over time. At least that is how it was explained to me. Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted January 17, 2010 Share Posted January 17, 2010 Coool! So, will this thing spit out overfueling on cyl# whatever codes or something similar? Quote Link to comment Share on other sites More sharing options...
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