Sudden jump in MPG!!.. Wait a second....
02-07-2011, 06:58 AM
#26
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in case you dunno, there is a enrichment table in the ECU. I dunno what MM did to the tune but the ECU will build this trim over time, sometimes in a day, sometimes weeks, sometimes months. depends on your driving condition. so that might explain why he is getting slightly better MPG over time.
also, as far as I know MM tune will turn the OMP rate up. which results in better sealing. so yeah, that might help to get him a bit better mpg overtime, cuz the ECU sense better combustion from the Front O2 sensor = better a/f ratio = better mpg. get it ?
also, as far as I know MM tune will turn the OMP rate up. which results in better sealing. so yeah, that might help to get him a bit better mpg overtime, cuz the ECU sense better combustion from the Front O2 sensor = better a/f ratio = better mpg. get it ?
the point of my post was to try to find an explination on why my MPG suddenly increased. was i unclear in my initial post? ive searched it. nothing came up. my routine/habbits are quite consistent. so is the weather here in so cal. thank you for offering a possible answer to my question even though you didnt feel there was a point. sorry that my post upset you so much.
02-07-2011, 07:42 AM
#27
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Ill just throw my mpg in to **** some people off, I drive mostly highway i get 285-300miles a tank, shifting at 3, red line sometimes. I even got 190 miles on half a tank one time driving 30-45 mph on highway bec on snow. I was on that highway for hours, I love my 8.
02-07-2011, 07:57 AM
#28
i guess that is a possible cause but 1.5 months? i find it a bit hard to believe that the ECU would cause a jump that drastically in the matter of one fill but ill take it.
the point of my post was to try to find an explination on why my MPG suddenly increased. was i unclear in my initial post? ive searched it. nothing came up. my routine/habbits are quite consistent. so is the weather here in so cal. thank you for offering a possible answer to my question even though you didnt feel there was a point. sorry that my post upset you so much.
the point of my post was to try to find an explination on why my MPG suddenly increased. was i unclear in my initial post? ive searched it. nothing came up. my routine/habbits are quite consistent. so is the weather here in so cal. thank you for offering a possible answer to my question even though you didnt feel there was a point. sorry that my post upset you so much.
my opinion is that unless its something like constant for example 10 times in a row, then I will consider it "worthwhile"
Its just some people here that can't accept my opinion and call me close minded when they don't even know **** themselves.
its ok tho.
and yes, it usually takes a while to build fuel trim. and from time to time the value change on its own, again it all depends on driving condition.
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