What Are Short|Term and Long|Term Fuel Trims?
Quick question on fuel trims | Toyota Nation Forum
”Fuel trim” refers to the feedback compensation value compared against the basic injection time. Fuel trim includes short−term fuel trim and ...
Are these fuel trims normal? | BimmerFest BMW Forum
Short term trims are meant to fluctuate like that. It's LTFT you ... The long terms are the most important from a diagnostic viewpoint.
long term fuel trim around -18% - Page 2 - YotaTech Forums
Fuel trims are an inferred value they are not derived from a single reading. The Trim is what the computer is requesting to bring the engine ...
My short term fuel trim is 20% - AcuraZine
Your O2 sensor operates as a switch...if the voltage read is > 0.5V, means you have a small amount of oxygen, so more oxygen is needed (which ...
Long term and short term fuel trims - NASIOC
The long term and short term fuel trims are the stock ecu's ability to compensate for environmental changes. If you are running stock injectors, and have your ...
Importance of RESETTING Fuel Trim (LTFT) - Matthews Volvo Site
The LTFT is basically a long term running average of the STFT. If the BFM was perfectly adjusted, and unless something is broken it is usually pretty close, the ...
data log short term fuel trim issue | Lightning Rodder
A value above 1 (eg 1.08) means the truck is running lean, and the computer is adding 8% more fuel to remedy this. Less than 1 (eg .97) means the truck is ...
Short & Long term fuel trims | FerrariChat
Bank 2 is adding fuel, you are running lean. With 0% long term and 24% short term means it running open loop and you have a DTC causing the B2 ...
Confused with fuel trims and datalogs - IW STi Forum
You can think of fuel trims must as in the term of how your memory works. Short Term Fuel Trims are just what they say, Short Term ...
High Long Term Fuel Trims at Idle | Jeep Wrangler TJ Forum
If you have higher fuel trims at idle that means your injectors, when operated at a low duty cycle, are delivering less fuel than they are when they are ...
Strange Fuel Trim Values - Ford Truck Enthusiasts Forums
The fuel trim has two means of adapting; a Long Term Fuel Trim and a Short Term Fuel Trim. Long Term relies on the fuel trim tables and Short Term refers to ...
Long term fuel trim out of spec bank 2 - GM Longroof Forum
Well, subject says it. Short term fuel trims are all on-spec, long term on bank 1 (driver side) is correct, but long term on bank 2 is out ...
Why Long Term Fuel Trims Remains in Negative?
The long term fuel trim is comparing the actual fuel trim (fuel pressure x duration of the pulse) to a table of theoretical values stored on a ...
How to interpret fuel trim long/short %'s? - Tuning - LegacyGT.com
testes,. Thanks for the input. So if I understand you correctly, the short trim is a "short term memory" adjustment to the fueling maps, ...
Short and Long Term Fuel Trims - Help | Cherokee SRT8 Forum
On startup, the 2/1 Short Term matches the 1/1 Short Term, but in a minute or two, the 2/1 Short and Long shoot up to 33 and hold. The only time ...
Short Term Fuel Trims | Mustang and Ford Performance Forums
Your Short-Term Fuel Trims are the correction the ECU needs to make to bring the actual AFR, and the commanded AFR your tuner called for fall in line with each ...
Fuel trims - Ecoboost Performance Forum
Long term fuel trim is what the ecm has learned it needs to change to meet the commanded programming. Short term fuel trim is what the ecm is calling for on ...
Short and Long term fuel trim.. Uh, what ? - Chevy Message Forum
I checked the fuel trim, both short and long after the car is warmed up... At idle my short term fuel trim runs -0.8 to 2.3 on average with the ...
Negative Fuel Trim ( Long- and Short-term) - CR-V Owners Club
The CR-V started to show some performance issues: Sluggish acceleration, especially when the AC is on Slightly reduced MPG (10% or so)
High Long Term Fuel Trim at Idle: Causes, Solutions & Ideal Levels
If the short term is reading a minus reading then it will start to bring down the long term trim over time. Customer. nothing in the negative ...