Does anyone know the break down on Fuel Trim Cells?
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Originally Posted by Team ZR-1
IMHO,
Once ECT meets the temp (122 to 140 degrees) it switches to closed loop and stays there. It cannot go back to open loop unless the ECT goes below the switch temp or something wrong.
PE or WOT are not in open loop, its in one of the 7 modes PCM has and that is PE MODE.
Open loop also would use AIR which does not happen in PE.
It is not just 15 KPA, its a "AND" along with other requirements to go into PE mode such as TPS angle
WOT is not just when in cell 22, as per EPA/SAE its when engine is at 100% engine load so cell 15 is just as well WOT and cell 22 is PE if for that engine what load the cell operates in depending on also what the RPM is and what the MAP value is.
Once ECT meets the temp (122 to 140 degrees) it switches to closed loop and stays there. It cannot go back to open loop unless the ECT goes below the switch temp or something wrong.
PE or WOT are not in open loop, its in one of the 7 modes PCM has and that is PE MODE.
Open loop also would use AIR which does not happen in PE.
It is not just 15 KPA, its a "AND" along with other requirements to go into PE mode such as TPS angle
WOT is not just when in cell 22, as per EPA/SAE its when engine is at 100% engine load so cell 15 is just as well WOT and cell 22 is PE if for that engine what load the cell operates in depending on also what the RPM is and what the MAP value is.
Is PE Mode only at WOT- i.e. cells 15 and 22??
Thanks!
joel
Last edited by binksz06; Jan 9, 2004 at 03:52 PM.
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From: St Louis, MO
I also consider cell 15 as a normal cell, but it is high map and high rpm. In fact, the map is so high that its impossible for me to hit cell 15 at this altitute. Barometer is usually around 80kpa.
Performance wise, what is the difference in being in cell 15 versus cell 22? Is there any difference in fueling, knock retard, torque management, etc when operating in these cells?
I just noticed that all my WOT runs happen in cell 15.
I just noticed that all my WOT runs happen in cell 15.
Last edited by BigTex; Jan 27, 2004 at 11:35 PM.
