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Old 01-21-2012, 12:58 PM
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Verts4Ever Verts4Ever is offline
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Location: Phoenix West Valley
Join Date: Jul 2011
Posts: 964
Mein Auto: 2011 E93 335i
Originally Posted by DSXMachina View Post
The PCM has to consult the intake air temperature graphs, the intake air density graphs, the engine temperature graphs, the fuel octane and composition (methanol percentage?) graphs, the barometric pressure graphs, the accelerator pedal position graphs, the injector history graphs, the long term fuel trim graphs and whether the driver is drinking coffee graphs. It then tries to come up with an injector pulse which will nail the desired rpm while doing a delicate balancing act with the idle air control bypass system. It ain't easy.
Thanks, DSX. Very informative stuff.
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