Quote:
Originally Posted by jamesm
i saw the same thing tuning my car for e85. i would log fueling error with the ports turned off and get corrections in one direction, then log with ports only and get different results. getting both 'in spec' independently fixed virtually every drivability problem i had prior to doing this, particularly rough idle, rpms hunting, dipping rpms coming to a stop, stumbling at tip-in, etc. all related to big swings in afr introduced by the disparity in required trim when the switchover happens between injection modes.
you can use the 3 port/di ratio tables to set the ratio. 100% is port only, 0% is di only.
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Thanks.
Which table/s did you alter to affect direct injection scaling? I can see the port injector scaling easily.
Did getting this balance right also help your tip-in knock?