Ltft boosted brz
 

JDL turbo, stock fuel system on 7psi from delicious flash & go.

The pictures are from fully warmed up & on idle. When I give it gas/wot the LTFT & STFT hit 0.0

How many miles on the tune usually I give it the 50 miles or so for the trim levels to stabilize.

Sent from my IN2017 using Tapatalk

About 500-600

Keeps my AFR around 14.4-15.1(lowest I’ve seen is 13.9 daily to at idle)

you need to log more and post to datazap so we can see whats happening, that s screenshot is useless without more data

it s probably just the maf/hybridSD that is scaled that way and for your car is not perfect
in that case,since it is basically an OTS tune, unless you convince Delicious in rescaling your maf better, you won't do much about it

with a log we can see if it's something else

also there is a sticky thread for these things

I will do so tomorrow

Also I noticed today when I turned the car off, from the passenger side there was a Vaccum Suction.. anyone have this issue before?

from logs we should see if there is an intake/vacuum leak

I’ve got a lot from 3/21 I’m uploading now

https://datazap.me/u/limitlessbrz/32121?log=0&data=2


this is during driving

Useless log, too few values

Do a proper log with ecutek and laptop

If you register log from Dashboard on the ecutek app, you need to manually add EVERY important value

With laptop you have to manually add the SD values because flash n go tunes are hybrid SD


You spend hundreds of $ in a retune, and your tuner leaves you idling with -20% ft and doesn't explain you how to log ? ...

Logging from a phone with ecutek kit is fine. Don't need a laptop. Look at DT requirements for logging and then post a log.

Haven't retuned it yet, waiting on injectors to come in and retuning than

The log itself is definitely missing all important parameters except AFR, and overall is rather useless for debugging. Yes EcuTek app logs fine, but as mentioned you must select additional parameters for this to be a useful log.

Be sure at minimum to add Engine RPM, LTFT, STFT, fuel system status, and Commanded AFR. These will serve best to tell you as an end user what is going on when looking at the log. The rest of the information wont mean much to you, but they mean a lot for tuning, so the more parameters you log the better someone here can assist.

Generally, the ProECU Desktop defaults are good parameters. Match these in your app if that is what you are using to log.

On the issue itself, total fuel trims beyond 20% either direction is not good, but it is also somewhat expected if you have a only a single Flash and Go iteration. Generally these are best to get the car moving but are not ideal under hard driving. I definitely strongly recommend working on more tune iterations because the car is very far off right now based on your screenshots.

Also FWIW, LTFT and STFT dropping to zero is normal when you give it enough throttle for the ECU to switch to open loop (fuel system status 4). Most tuners especially for FI will disable LTFT in open loop. Ensure you log Fuel System Status, once you see it switch to 4 the car is in open loop mode. You then want to look for the Actual AFR to follow the Commanded AFR. Ideally connect and log output of a wideband but it is not required.

Since your closed loop fuel trims are so far off, I would expect your fueling in open loop to also be off. They at least have it on the richer side vs leaner side (more safe), but it is worth observing open loop operation to make sure you are not excessively rich as this can also cause its own set of problems.

Just have Steve tune your car he doesn't charge much and his tunes are really good.

Sent from my IN2017 using Tapatalk