Another STFT question. Please Help!

brandonckc

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Yes, I'm using stock intake

Outside USA, computer uses STFT and LTFT till MAF voltage is 4.1 at that it switches to fuel strat 2.
This means it uses open loop. So, it goes directly from MAF curve values.
Till voltage 4.1 LTFT and LTFT play a role after not.

Hence different strategy of calibration has to be used.
Before you try to reduce LTFT to a range +-2.
For open loop you need to look AFR, AFR adj and AFR cmd.

The only good software for doing this was from Vit viper (unfortunately I do not have it)
Your log should be kdlg or dlg format so that my ktuner can read it.
Wait. You said you had -8 ltft and -15 stft with the stock intake? That's a total of -23% fuel trim right there.
I don't plan to run my car with tune anymore. I'm quite paranoid with the reliability of this motor and seen more and more post regarding blown engine. So i decided to return everything to stock sell away the flashpro. I love the power though.

I'm not quite sure whether these high negative fuel trims does happen on a stock car? (stock intake & stock map).
Is anyone with the stock intake and stock map seeing the same negative fuel trims?
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