Tune Help

[dholloway543]

I just installed the sbd500x kit and flashed the base turbo tune I need some help with my stft and ltft.


https://datazap.me/u/dholloway543/de...=0&data=7-8-10


What should i change via rom raider to get the fuel trims better?

[tomm.brz]

Check for exhaust leak near the lambda sensor first

[steve99]

As above check for exhaust leaks before or near 02 sensors, your ltft is huge positive.


Check tune has correct injectors scaled to match current injectors
Check the direct injection computer is bolted up to engine with all three bolts
Check your flex kit connection if your running flex, and that ethanol reading is same as what fuel is in tank.
Check tune has correct intake\maf scaling to suit intake pipe used.

Something is causing a fueling error of over 30% or a perceived fueling error.

[dholloway543]

Second o2 sensor was loose thank you guys

[dholloway543]

I need a tune but it's Sunday ��. My ltft is still at 40 after tightening everything from intake back to exhaust tip. I have no cell either

[YamahaR86]

Originally Posted by dholloway543

I need a tune but it's Sunday ��. My ltft is still at 40 after tightening everything from intake back to exhaust tip. I have no cell either

My LTFT was high for a while, got worse over time. I tightened everything I suspected and sprayed water.


Took it to a shop finally since I was getting CEL for lean. LTFT shot up to 30s. It ended up being the PCV valve that got loose. They smoke tested it.


Also check the intake hoses under the manifold. I clamped those off and that helped a little, cleared a code.

[dholloway543]

Turns out a good tune goes a long way. Im working with my tuner and he got my stft and ltft to 0 while driving and rn its at 20 idling. The car no longer smells of gasoline and its not running rich. Must have been the wrong map sensor and the tune

[jflogerzi]

Originally Posted by dholloway543

Turns out a good tune goes a long way. Im working with my tuner and he got my stft and ltft to 0 while driving and rn its at 20 idling. The car no longer smells of gasoline and its not running rich. Must have been the wrong map sensor and the tune

Check your header for leaks. Typically that's where your gonna have issues with idle stft and LTFT. I have the same problem with my boosted car and hope to have this fixed as I am switching headers. Keep you posted if this fixes my issue

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