I have been getting very consistent gas mileage since 10/13 when my 12 Civic Si was last tuned on a dyno. On the highway, it was not hard to get 34mpg and 31 city (calculated).
Now, since I had to clean the water out of my gas tank, fuel lines, fuel filter, injectors, etc., my gas mileage has dropped (calculated) to 30 highway and 26 city.
Do the attached calibration and datalog* files from today tell you something that I am missing?
Thank you,
Steve
*One is a WOT run to 80 and the other is a mix of highway and city driving.
Gas mileage drop?
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steve47co1
- Posts: 22
- Joined: Fri Feb 13, 2015 9:37 am
Gas mileage drop?
- Attachments
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- 3-4-15.fpdl
- (679.82 KiB) Downloaded 163 times
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- wot 3-4-15.fpdl
- (264.63 KiB) Downloaded 151 times
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- TC Retune-3-4-15.fpcal
- (21.29 KiB) Downloaded 167 times
Re: Gas mileage drop?
The fuel trim is negative, especially at low injector openings. This will affect fuel economy.
- fuel trim.png (37.4 KiB) Viewed 3566 times
Hondata
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steve47co1
- Posts: 22
- Joined: Fri Feb 13, 2015 9:37 am
Re: Gas mileage drop?
Thank you, Hondata! I will look into that.
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steve47co1
- Posts: 22
- Joined: Fri Feb 13, 2015 9:37 am
Re: Gas mileage drop?
You were right. Very negative fuel trim; running super rich at WOT. My tuner sent me a revised map; I will data log tomorrow and see what it looks like.
Thank you.
Thank you.