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Old 07-26-2020, 04:48 AM   #1
dholloway543
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TC messing with fueling

Question for people with boosted cars. So when I floor it and the turbo spools up the wheels spin around 5k to 6k rpm. After multiple pulls the tune starts to learn that area needs to be richer and it shows in the logs. ltft and stft are turned off and im on ecutek.


Is there a way to get ecutek to stop changing fueling due to traction control throttle cuts.
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Old 07-26-2020, 04:46 PM   #2
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After several pulls the system is getting hotter and the chance of engine damage increases. To stop the possible damage the program will pull timing and run richer.
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Old 07-26-2020, 05:26 PM   #3
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The ECU won't just start adding fuel, if there is 0 or consistent LTFT (STFT is disabled at WOT) then it's not "learning" to add fuel. There will be a compensation that is being triggered, you just need to know what it is.
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Old 07-26-2020, 10:32 PM   #4
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What exactly does it show in the logs that makes you say its running richer? Is the IAT the same?
Is the AM still at 1?
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Old 07-27-2020, 07:19 AM   #5
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I'll do 2 longs in the morning. One will be on the learned tune, then I'll flash back and log a fresh tune. I'll also try to include the tc kicking in to show the region it's in
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Old 07-28-2020, 07:04 PM   #6
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https://datazap.me/u/dholloway543/le...g=1&data=23-30


For some reason it looks like the afr spike I was talking about is caused by the accelerator petal being lowered to 30%, even though I had it floored the whole time. I dont know what that would be caused by.
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Old 07-28-2020, 07:23 PM   #7
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Originally Posted by dholloway543 View Post
Question for people with boosted cars. So when I floor it and the turbo spools up the wheels spin around 5k to 6k rpm. After multiple pulls the tune starts to learn that area needs to be richer and it shows in the logs. ltft and stft are turned off and im on ecutek.


Is there a way to get ecutek to stop changing fueling due to traction control throttle cuts.
Turn off TCS.

Or, run stickier tires so that TCS doesn't need to intervene. Unless you have a ton of power.
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Old 07-29-2020, 12:44 PM   #8
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If it's pedal % rather than throttle (I haven't looked at the log) then check the pedal connection. I know of at least one car where the pedal sensor was an issue.
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Old 07-29-2020, 09:10 PM   #9
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Logs say: Traction control shut you down by closing the throttle.
Iat temperature was cooler, .6 more timing and your tires were probably colder.

Easy fix turn off traction control.
or buy some federal 595rs-rr tires

Last edited by solidsnake11; 07-29-2020 at 09:37 PM.
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Old 07-30-2020, 09:12 AM   #10
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it's ecutek overboost acting


i know because i did the tune
or at least, tried to


he encountered so many exhaust leaks, vacuum leaks, EBCS leaks and frame-hitting knock triggering that no matter what I did, every 2-3 releases the Duty cycle map and timing table went totally off


Also, Derek here (OP) spend most of the time in 6th gear under 3000rpm, flooring it in 6th gear
with stock 12.5:1 compression and a sbd500x turbo


i have few time because i work 18 hours everyday for the summer season, i ll try to help you again end of august if you want
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Old 07-30-2020, 08:10 PM   #11
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Your totally right there is a boost cut there. I didn't notice. Honestly I've pushed this tune far from where it was left. I know I've messed some stuff up but it's driving good. I'd love to have you check over it to make sure everything is good but no rush man. With covid it's definitely not the best time and work is more important
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Old 07-30-2020, 09:42 PM   #12
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it's ecutek overboost acting


i know because i did the tune
or at least, tried to


he encountered so many exhaust leaks, vacuum leaks, EBCS leaks and frame-hitting knock triggering that no matter what I did, every 2-3 releases the Duty cycle map and timing table went totally off


Also, Derek here (OP) spend most of the time in 6th gear under 3000rpm, flooring it in 6th gear
with stock 12.5:1 compression and a sbd500x turbo



i have few time because i work 18 hours everyday for the summer season, i ll try to help you again end of august if you want
OP that's a great way to throw a rod.
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Old 07-30-2020, 10:26 PM   #13
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Originally Posted by tomm.brz View Post
it's ecutek overboost acting


i know because i did the tune
or at least, tried to


he encountered so many exhaust leaks, vacuum leaks, EBCS leaks and frame-hitting knock triggering that no matter what I did, every 2-3 releases the Duty cycle map and timing table went totally off


Also, Derek here (OP) spend most of the time in 6th gear under 3000rpm, flooring it in 6th gear
with stock 12.5:1 compression and a sbd500x turbo


i have few time because i work 18 hours everyday for the summer season, i ll try to help you again end of august if you want
Ok, I just noticed right before it cut the throttle, the wheel slip went up.
The second time it went to the same boost at same rpm but didn't cut the throttle with no wheel slip.
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Old 07-31-2020, 01:52 AM   #14
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OP that's a great way to throw a rod.
he is forged, both pistons and rods
and I tame timings for gears

but still, difficult to manage when you have any king of leaks or knock triggerint because of frame hitting or worm engine mounts
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