03-28-2022, 10:06 AM | #1 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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Brand new stock/untuned ZL1 LTFT's very negative, normal?
Im trying to find out if I should be concerned with my new 21 ZL1 I just got. The Long term fuel trims are very negative which means the car is trying to undo a very rich condition that I assume the stock tune is calling for?? I dont have a wideband installed, so the log I have has limited info. Is this normal for a stock ZL1 a10??
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03-28-2022, 12:13 PM | #2 |
Drives: 2017 Camaro 1SS Join Date: Aug 2016
Location: NH
Posts: 1,692
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Seems weird. There was just a thread where a guy picked up his new ZL1 and it was getting VERY BAD mpg. He ended up unplugging the battery for a while to 'reset' the car. After he hooked it back up and drove some more, he said it acted MUCH better?
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03-28-2022, 05:35 PM | #3 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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Yeah I was the one that told him to do that. Lol. I’ve done that a few times and my gas mileage is completely fine. Im looking at fuel trims. This is probably the wrong forum to ask. I’ll take this to the HPTuners forums.
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03-28-2022, 08:09 PM | #4 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,796
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-11% is not that rich. Very rich would be the point where the ECM can not correct. It's still able to correct afr to maintain stoich. I do agree it's odd that it's showing -11%. Most stock tunes are around 0 to +5%. Try resetting the fuel trims and see what happens.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
03-30-2022, 07:53 PM | #5 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,223
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Quote:
Ted.
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Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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03-30-2022, 09:38 PM | #6 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
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05-08-2022, 07:50 AM | #7 |
Snackbar Tuning
Drives: 2023 SGM ZL1 Join Date: Oct 2016
Location: Florida
Posts: 1,108
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That isn't unusual at all
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