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Okay so I am assuming that is is not okay for my LTFT and my STFT to be like -9. Anyone know why this is happening? Also have a very lean warm startup any ideas?
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Last edited by Watazz; 03-16-2011, 01:42 AM. -
Re: Ltft & stft
from a few things Ive read its okay as long as my AFR is cool under WOT. But I still have a startup AFR problem and I still continue to run either full lean or full rich under cruise. I will replace the header gaskets soon to rule that out as I seem to have an exhaust "flutter". -
Re: Ltft & stft
When's the last time you tuned your LTFT's and STFT's? I'm definitely no expert (starting to get my feet wet), but -9 doesn't seem that bad. After you're tuned, you want them to be between -4 and 0 I believe.
For some reason, I was thinking negative numbers were rich and positives were lean. My incorrectness would explain the incredibly high positive numbers because I am running super rich... Thanks!Comment
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Re: Ltft & stft
Anywhere between -4 and +4 is good for lifts, short term lifts I never mess with because once the long term lifts are good they ususally follow, but your correct -4 woulb be adding and +4 is the car running too lean. Thats how I usually have gone by. I have done my lifts by using the injector table getting the values as close together and then it will get your lifts closer to 0. Btw -9 isn't that bad.08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engineComment
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Re: Ltft & stft
So I should try and get my injector numbers as close together as possible. Its just weird because that car isnt runing lean. Under WOT its perfect.Comment
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Re: Ltft & stft
Whats your injector table look like?08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engineComment
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Re: Ltft & stft
scaled from 33 to 34Comment
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Re: Ltft & stft
32.99937 33.15925 33.32069 33.45787 33.57883 33.67884 33.77945 33.85861 33.92044 33.96917 34.00026
I also changed the VE table around a bit. Im begining to think it did more harm than good. Saw -14 in LTFT today.Comment
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Re: Ltft & stft
33.00 33.13 33.26 33.19 33.42 33.55 33.68 33.81 33.94 34.07 34.20
Yes , I would try it closer like above08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engineComment
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Re: Ltft & stft
gotcha. Ill try that steve. thanksComment
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Re: Ltft & stft
So I made my injector table a little closer together and my wideband doesnt seem to jump around as much, I also went back to the stock Main VE. Ive noticed that LTFT doesnt drop down until after WOT (-12_-18) under WOT LTFT is -6_-9 and STFT is 0.Last edited by Watazz; 03-16-2011, 08:18 PM.Comment
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Re: Ltft & stft
ALL trims are looking much better. I set all the injector values the same and reset the fuel trims. I rarely see them skew away from 0 under WOT and they dont drop down as much durring deceleration.Comment
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