ltft % 0 with lund flex fuel tune

[pwnall1337]

Hey guys.

My bank1/bank2 sensor 1/2 o2's are reading temperature correctly. My short term fuel trims are working and my ect works and my car runs in closed loop, however tuning with lund we can't get the lftf % to record any data as it's always 0 via obd2 or 1.0 % in the logs. no dtcs the car has 660 miles on it and the tune is freshly flashed with about 10 miles on it each time flashed as I was trying to troubleshoot the issue.

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[GSLSE20B]

Hey guys.

My bank1/bank2 sensor 1/2 o2's are reading temperature correctly. My short term fuel trims are working and my ect works and my car runs in closed loop, however tuning with lund we can't get the lftf % to record any data as it's always 0 via obd2 or 1.0 % in the logs. no dtcs the car has 660 miles on it and the tune is freshly flashed with about 10 miles on it each time flashed as I was trying to troubleshoot the issue.

That is what it should be . Pull your brake booster nipple and see if it jumps or have them turn ltft learning on :lol:

 

[Terminator2]

Hey guys.

My bank1/bank2 sensor 1/2 o2's are reading temperature correctly. My short term fuel trims are working and my ect works and my car runs in closed loop, however tuning with lund we can't get the lftf % to record any data as it's always 0 via obd2 or 1.0 % in the logs. no dtcs the car has 660 miles on it and the tune is freshly flashed with about 10 miles on it each time flashed as I was trying to troubleshoot the issue.

It could be disabled it the tune or it's possible it's just staying at 0.0 like it should if your MAF is well adjusted and your stoich is correct for your fuel type.

 

[pwnall1337]

yeah they claim it's on for sure in the tune. I know they haven't given me the go ahead, but my car is like 20 miles till empty and im about to fill it with e85 and watch lamba lean out until e% rises lol. I opened gt350 map in my hpt software and looked at FF settings and default e% learning is maf between 2.40 -> 8 lbs/min so you have to cruise for it to learn e% since maf is under 2 at idle unless lund has different settings.

 

[GSLSE20B]

yeah they claim it's on for sure in the tune. I know they haven't given me the go ahead, but my car is like 20 miles till empty and im about to fill it with e85 and watch lamba lean out until e% rises lol. I opened gt350 map in my hpt software and looked at FF settings and default e% learning is maf between 2.40 -> 8 lbs/min so you have to cruise for it to learn e% since maf is under 2 at idle unless lund has different settings.

If your stft is -3 , what is your ethanol content showing ? Stft is what determines the ethanol value . + would make the % rise and - will decrease during the learn cycle .

 

[pwnall1337]

If your stft is -3 , what is your ethanol content showing ? Stft is what determines the ethanol value . + would make the % rise and - will decrease during the learn cycle .

just filled with E85 from 8 miles till empty. stft working as it should. just found this. looks like im notnthe only one.

http://www.hptuners.com/forum/showthread.php?58324-LTFT-not-showing

 

[pwnall1337]

car is running great on e85. alch %is between 77-78 which is a little under since it's e85-e90 in my area but i don't expect much from a virtual sensor. The car is obviously not running lean since I monitor the rear o2 lambda on my ngauge. Car is -KR like a mofo and adding soo much timing at partial throttle/wot lol.

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