Long term fuel trims stuck at 0
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Long term fuel trims stuck at 0
Hey everyone, I'm having a problem that has been bugging me for awhile now and I can't seem to figure it out. I have an 03 3g turbo'ed eclipse running practically all evo 8 gear including ecu wired in conjunction with my stock ecu (auto tranny car). I'm trying to scale my injectors (440cc) and have run into a problem where my LTFT's will not change at all, they are just stuck at 0.
My car is going into closed loop fine and everything and I am seeing feed back from the STFT's and also seeing voltage from both of my o2 sensors on evoscan. I have also tried mitsulogger as well. I have let the car idle multiple times sometimes over 25 minutes and have gone on numerous 20-30 minute cruises. At idle my wide band is sitting around 14.4-15.1 and my STFT's are between 3 and -3. When at idle my airflow/hz are at 37.5. I have tried resetting the ecu by disconnecting the battery and touching the terminals and cranking the car to get all of the power out. I have also tried 3 different evo roms, including the tephramod v7 rom, but nothing has worked. All of the roms I have used are ones that someone has edited the periphery bits so I don't throw any codes (things on the evo that 3g's don't have...also the immobilizer was deleted on 2 of them) I really do not know what it could be at this point, maybe i wired something wrong when I was wiring the ecu? Would a boost leak cause this possibly? I idle at about -21,-22 in vacuum so I don't think I have a leak. Any input is greatly appreciated, Thanks.
My car is going into closed loop fine and everything and I am seeing feed back from the STFT's and also seeing voltage from both of my o2 sensors on evoscan. I have also tried mitsulogger as well. I have let the car idle multiple times sometimes over 25 minutes and have gone on numerous 20-30 minute cruises. At idle my wide band is sitting around 14.4-15.1 and my STFT's are between 3 and -3. When at idle my airflow/hz are at 37.5. I have tried resetting the ecu by disconnecting the battery and touching the terminals and cranking the car to get all of the power out. I have also tried 3 different evo roms, including the tephramod v7 rom, but nothing has worked. All of the roms I have used are ones that someone has edited the periphery bits so I don't throw any codes (things on the evo that 3g's don't have...also the immobilizer was deleted on 2 of them) I really do not know what it could be at this point, maybe i wired something wrong when I was wiring the ecu? Would a boost leak cause this possibly? I idle at about -21,-22 in vacuum so I don't think I have a leak. Any input is greatly appreciated, Thanks.
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Is it driving bad? Is it idling bad? Is there a huge drop in fuel effeciency? If the STFT's are consistantly between +/-3, then there is not enough trim to effect LT's. It sounds like everything checks out.
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This is the first time driving since the turbo install, but it seems to drive okay, it idle's very lean on start up for a few seconds then straightens itself out. The STFT's are between +/-3 only at idle, during driving they go all over the place from positive to negative (not sure what range exactly) but I would think that the LTFT's would change at least a little bit because I know its impossible to get them exactly perfect. There is no way I could get my latencies and injector scaling right on the very first time, even though I did use scalings and latencies from someone else who used the same injectors.
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