MitsuStyle - View Single Post

**asshanson** · 03-02-2009

No I have v2 still. I sort of expected the fuel trims to be that way because I downgraded from 1600s to 1350s, so it makes sense they were positive 6% (I also raised fuel pressure back to 43.5 base).

However, when I do the calculation for injector compensation:
1350/1.35 for e85 compensation = 1000cc injectors on pump
(450/1000) - 1 = -55%

I made sure the deadtime was on, the low and mid fuel trims are close to each other, but they dont go to zero until my global is -45%. This definitely explains why it's so rich at WOT (extra 10% fuel from what calculations suggest), but why is it so messed up at idle and cruise?

Should I let my low and mid fuel trims chill at +10% and be 11:1 at WOT? Or should I make the trims zero and have to mess with the fuel settings above 4k rpm?

03-02-2009	#4
asshanson immune from paybans Join Date: Oct 2005 Location: West Des Moines Drives: poorly Posts: 4,358	Re: Injector/fuel question No I have v2 still. I sort of expected the fuel trims to be that way because I downgraded from 1600s to 1350s, so it makes sense they were positive 6% (I also raised fuel pressure back to 43.5 base). However, when I do the calculation for injector compensation: 1350/1.35 for e85 compensation = 1000cc injectors on pump (450/1000) - 1 = -55% I made sure the deadtime was on, the low and mid fuel trims are close to each other, but they dont go to zero until my global is -45%. This definitely explains why it's so rich at WOT (extra 10% fuel from what calculations suggest), but why is it so messed up at idle and cruise? Should I let my low and mid fuel trims chill at +10% and be 11:1 at WOT? Or should I make the trims zero and have to mess with the fuel settings above 4k rpm? Last edited by asshanson; 03-02-2009 at 11:08 PM..