Quote:
Originally Posted by Ilma
Right.....so that is the question.
Is there a table which plots IAT's and adjusts the main timing table to drop timing values when a certain threshold temp is reached.
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There are two IAT ignition retard tables. One is factor based. The other is max degree based. For e85 use, we modify them to be more tolerant of higher IATs since the TMAP doesn't see the in-cylinder cooling benefits of ethanol. I suspect the reduction in timing that happens from time to time in 4th gear has more to do with transmission control/trans oil temp.