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LTFT's looking weird

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4
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Location
Johannesburg, South Africa
#1
Hi everyone
For a while now, my car has had a high negative LTFT (-7% to - 16%), with STFT'S being pretty normal (-1% to 1%).

Current mods include a stage 1 remap and full exhaust (including downpipe).

It's only done it within the last 2-3 months. I
have a feeling it could be an exhaust leak, turbo inlet leak or a bad O2 sensor.
(pretty sure I've hit a couple bad potholes, which maybe knocked something loose?)
What's the most likely explanation? I'm going to check out the downpipe and all boost pipes soon though.

Any help will be appreciated!
 


Rocketst

1000 Post Club
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842
Location
Chesapeake, VA, USA
#2
Stft is adding to ltft so if the ltft is off so is the stft. +-5% is normal. It could also be due to warming up. Cold air compresses a lot better than warm air. Therefore you require less fuel to burn warm air at the correct ratio.

Sent from my moto z4 using Tapatalk
 


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