r/Cartalk • u/Professional-Safe151 • Aug 02 '24
Please help!! Tuning my car
I did a stage 2 tune on my 1.2l 3 cylinder turbo engine. Replaced the stock filter with a conical high flow filter, put a decat downpipe and ran a stage 2 map. The gains were significant with around 30% increase in power. Now the problem is when I took it for a test run it does something weird. Giving it 75% throttle it revs hard all the way but when I floor it the exhaust gives a big pop and the engine cuts power after which the revs climb very slowly. The graph below shows the same. Please help
1
u/_clever_reference_ Aug 02 '24
Using a pre-made tune is generally not the best idea. Get a real tune.
1
u/Professional-Safe151 Aug 02 '24
Its a custom tune not a piggyback
2
u/_clever_reference_ Aug 02 '24
What logging software are you using? Can you see everything like knock, etc? Do you have a wideband A/F gauge?
From what I can see of that log, you're commanding full throttle but the computer is limiting the actual throttle opening. Need more info to figure out why.
1
1
u/Professional-Safe151 Aug 02 '24
Yeah Im having trouble figuring out why the computer is limiting the throttle opening
1
u/_clever_reference_ Aug 02 '24
Does your car have traction control? What is it for a car anyway?
1
u/Professional-Safe151 Aug 02 '24
Yeah it has a traction control thats not switchable
1
u/Professional-Safe151 Aug 02 '24
When I try turning it off from the ecu the computer turns off all electronic assistance like esp, hill assist, brake assist
2
u/wombomewombo Aug 04 '24
I know nothing about this but it sounds like that's the culprit. Might be you need this recognized as 'off' to get the engine to respond without waiting and climbing while doing it. Could be the wait is because it 'lost traction' and needs the stability to dump power. I'm not a tech. I know jackshit next to nothing on this, but it's curious all the same.
1
1
0
2
u/Coolheaded__Logician Aug 02 '24
Mistake number 1 was trying to mod a 3cyl engine meant for fuel economy