Please explain the relation between ltft's and stft's and why they ...

The long term fuel trims should be in the negative meaning the PCM thinks you are rich at part throttle and will not give the extra fuel upon WOT.

help me understand LTFT/STFT - DSMtuners.com

2g: 2g's only have 2 fuel trims, a long term fuel trim (LTFT) and a short term fuel trim (STFT). The STFT varies with the O2 sensor, an the LTFT ...

STFT and LTFT/Short Term & Long Term Fuel Trim - BoostTown.com

LTFT and STFT are percentages which represent the adjustment to the fuel injector pulse width. The LTFT and STFT are added together, so a LTFT of 10% and a STFT ...

Simple Fuel Trims Explanation (STFT and LTFT) - YouTube

I made this video to explain the basics of fuel trims.

STFT and LTFT.... What do they mean? - Mazdas247

You might or might not understand the link, but STFT is a real time read of how much the computer is adding in fuel to reach the mixture you ...

LTFT vs STFT - Chevy Silverado and GMC Sierra Forum

Long term fuel trim (LTFT) is used to compensate for issues that seem to be present over a much longer period. and that's what we're after - how ...

Need help understanding LTFT and STFT! - Pontiac G8 Forum

You can think of LTFT as a long-term average of your STFT -- if your LTFT is perfect, your STFT will read 0. 5. The thing about LTFT is that it ...

STFT & LTFT please explain!!!! - HP Tuners Bulletin Board

the Fuel Trims adjust the sniffed exhaust using the o2 sensors, and the correction is stored as STFT and LTFT, no changes to fuel tables happen, this is called ...

Long Term, and Short Term Fuel Trims (LTFT and STFT)

Understanding: Fuel Trim: Long Term, and Short Term Fuel Trims (LTFT and STFT) · Remember: Even trims that are showing +-12% to 15% can still be ...

LTFT - How exactly is "long term" defined? | BobIsTheOilGuy

So if something like a vacuum leak causes the oxygen sensor to read lean, the STFT will reach the limits of it's adaptation as the ECU adds fuel ...

Understanding Short Term and Long Term Fuel Trim (a SD Premium ...

STFT reads opposite of LTFT (after repair fuel trim data) • STFT reads opposite of... For more information on this topic, I have written a ...

Fuel Trim(ming) Diagnostic Time - MOTOR

On some vehicles, if STFT has reached the specified limit, LTFT will change in a few seconds. On other vehicles it may take 15 to 20 seconds before a change ...

STFT VS. LTFT - Diablosport Forums

the LTFT's are the learned fuel trims over time... adjusting the slope will affect both, but we don't care about the STFT's... need to see what ...

A Deeper Look Into STFT & LTFT Part 1 - YouTube

PAY IT FORWARD . . . Please help me keep all my resources FREE for everyone to learn from and use.

SHORT TERM AND LONG TERM FUEL TRIMS - scannerdanner

Long term fuel trim (ltft) is used to keep short term fuel trim close to zero. ... That's the best explanation I've heard to date. Noah, you ...

STFT and LTFT: How does it work? - HP Tuners Bulletin Board

Lets start by defining what each of these functions does: Short Term Fuel Trim (STFT): A rapid, non-stored fuel adjustment described by ...

STFT and LTFT | Lightning Rodder

Ltft's are closed loop and mainly used while cruising and stuff like that. Stft is open loop fuel trims. I believe these trucks hit open ...

Long Term Fuel Trim - Tomorrows Technician

-13%.Once it reaches -13%, the O2 sensor again starts to read normal, and STFT begins to level out at -13%. Now, LTFT ...

Can someone explain Fuel trims : r/mechanic - Reddit

LTFT's usually don't move much, unless the map has been cleared. STFT's will bounce around in real time. I'm not going to go much further into ...

LTFT vs STFT vs Total Fuel Trim - whats going on??? - IH8MUD Forum

This can be confusing. Make sure I am fully understanding all this: Positive fuel trims mean that the ECU is adding more fuel to maintain 14.7:1 ...