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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications Help with reading my logs......something happened
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      02-13-2018, 07:29 PM   #1
ssgm1x
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Help with reading my logs......something happened

Hello, I need some help reading my attached logs......F10 N55 PWG. Car had a ECU Tune Stage 1 (stock no mods) and felt great. Did a month worth of driving with no problems. Then one day i got on it a few times. Later that day got in car to drive home and car felt sluggish.....as if the first 30% of the gas pedal was in ECO Pro mode (sluggish). I have to give car slightly more gas than normal .....felt sluggish, especially at low rpm. I cannot figure this out.....So i flashed back to 100% stock but no luck. Still feels sluggish at low RPM.No check engine lights either.... Can u guys look at these logs and tell me if u see anything. I have no idea what i am looking at....Thanks for the help and please post comments on logs if u see anything alarming...
log 1 below
https://datazap.me/u/ssgm1x/bmw-f10-...og=0&data=3-12
log 2 below
https://datazap.me/u/ssgm1x/bmw-f10-...og=1&data=3-12

Last edited by ssgm1x; 02-13-2018 at 08:14 PM..
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      02-14-2018, 08:40 AM   #2
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...Not at all an expert, but why is the boost target so low? Looks like the map is targeting around 8psi and actual seems to match. Also, not much timing, but the timing looks steady. You wouldn't expect to see timing corrections at that low of boost. The AFR seems ok for the boost level, running high boost you'd want to be in the 12.x to 13.x range, but 14 is ok for that low boost. Doesn't look like the fuel is crashing, either.
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      02-14-2018, 09:06 AM   #3
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I thought Waste Gate Duty cycle was weird..... car is 100% Stock. I put it back to stock after realizing car was not running right.
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      02-14-2018, 09:10 AM   #4
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Did you try contacting the person you got the tune from?
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      02-14-2018, 09:47 AM   #5
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Car ran great for months with ECU flash. Super strong!!!! Took my bro for a ride. Did a few WOT. Felt great. Later that day drove to work. When leaving work car felt sluggish. Very noticeable. I do not think the values change at all in an ECU flash to cause this. Also, after flashing back to 100% stock it felt the same.... Sluggish at low rpm. That is why I don’t not think flash had anything to do with it ( aside from 13 psi boost levels on a stock car lol )
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      02-14-2018, 09:49 AM   #6
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I looked at logs but I have have no idea what I’m looking at. But I do notice WDDC drops when giving gas a lot. I thought it goes up when giving gas to build boost quicker. Mine drops like a slope........
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      02-14-2018, 09:50 AM   #7
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Sorry, WGDC. Waste gate duty cycle
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      02-14-2018, 09:58 AM   #8
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can be anywhere from a boost leak to a bad injector, coil etc. Best to pull the codes and take it from there
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      02-14-2018, 10:53 AM   #9
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Very True ... but no codes. Just got car back from dealer. They updated everything. Took 5 hours. Lost all my coding too. But I cannot tell the difference. Still feels sluggish. The bmw 430i loaner they gave me was way more responsive than my 535i. And 430i was 4 cyclinder !!!!!
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