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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Quote:
Originally Posted by mad_sb
Yup, this miss-match exists stock and is what prompted me to write the first maf scaling how-to with brzedit.. I just didn't realize this was the cause at the time lol  |
James and mad-sb:
Can either of you provide a quick how-to on getting port/DI fueling right?
Is it worth re-scaling MAF first, or trying to balance fueling first with the stock MAF scale?