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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
short and long term fuel rims with boost?
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<blockquote data-quote="01bluesnake" data-source="post: 12725352" data-attributes="member: 84985"><p>I believe you are thinking of Lambda and what the air fuel ratio sensors are seeing. Fuel trims is a percentage correction from the base fuel table and is not measured in Lambda. If the cars short trim is 1.06 then the system is doing an immediate correction of 6% fuel to correct from the long term trim table. If the long term trim is reading 1.06% then it has learned a correction of 6% fuel added and thats what will be used in that area of the table</p><p></p><p>Once long term fuel trim is learned, you can see numbers + or - of 1.0, and the difference is the percentage of fuel being removed or added tp the overall table. Short trim's will always be changing depending, but shouldn't be very far off of 1.0 or the MAF transfer curve or others things might not be dialed in right.</p><p></p><p>Reading the Air fuel ratio sensors, is not the same as fuel trims</p></blockquote><p></p>
[QUOTE="01bluesnake, post: 12725352, member: 84985"] I believe you are thinking of Lambda and what the air fuel ratio sensors are seeing. Fuel trims is a percentage correction from the base fuel table and is not measured in Lambda. If the cars short trim is 1.06 then the system is doing an immediate correction of 6% fuel to correct from the long term trim table. If the long term trim is reading 1.06% then it has learned a correction of 6% fuel added and thats what will be used in that area of the table Once long term fuel trim is learned, you can see numbers + or - of 1.0, and the difference is the percentage of fuel being removed or added tp the overall table. Short trim's will always be changing depending, but shouldn't be very far off of 1.0 or the MAF transfer curve or others things might not be dialed in right. Reading the Air fuel ratio sensors, is not the same as fuel trims [/QUOTE]
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2011-2014 Mustangs
Engine/Tuning
short and long term fuel rims with boost?
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