Car is running terribly, no codes- Datalog posted

logankey121 · 03-06-2021, 02:53 PM

My car is a 2015 335 n55 with just under 70k miles.

I tuned my car on e30 using BM3 and ran it for a few days before it started running terribly, I tuned it back to 91 and it is still running awful, not sure what to do. I checked cyl 1 spark plug and it looks good.

https://www.bootmod3.net/log?id=6043...729b5a22cd14a8

Here is the Datalog from today.

Thank you all for the help in advance!

voxumf30 · 03-06-2021, 03:13 PM

You use the correct gas for each of these tunes? Also why would cylinder 1 need to be checked and not the others? I can't read logs, just curious.

LA1Z24 · 03-06-2021, 04:48 PM

Flash it back to stock then recheck for codes. We had some discussion a few weeks ago about BM3 not throwing codes. PTF of course denied BM3 would do this, but multiple people said it happened to them, including myself.

Pussiwillow · 03-06-2021, 06:11 PM

Quote:

Originally Posted by LA1Z24

Flash it back to stock then recheck for codes. We had some discussion a few weeks ago about BM3 not throwing codes. PTF of course denied BM3 would do this, but multiple people said it happened to them, including myself.

Anytime you have an issue, it's usually best to revert back to stock tune, relog and see if things cleared up, just the easiest method to start trouble shooting, as stated above ^ people are having codes pop up after going back to stock, bm3 seems to have a few cases where codes are being hidden with some users.

logankey121 · 03-06-2021, 06:29 PM

I will go back 100% to stock and try again.

logankey121 · 03-06-2021, 06:30 PM

I didn't mention that I checked cyl 1 spark plug prior to check for any issues before tuning, so I just wanted to check and see if I didn't accidentally not put it back correctly

Pussiwillow · 03-06-2021, 07:30 PM

Quote:

Originally Posted by logankey121

I didn't mention that I checked cyl 1 spark plug prior to check for any issues before tuning, so I just wanted to check and see if I didn't accidentally not put it back correctly

Make sure coil is seated and clipped back in the harness correctly, even so, a misfire should throw a code; misfires for some people don't show up while on bootmod3 from some user experiences, regardless what bootmod3 says there's several who experienced this, return back to stock and check codes and see if problem still exists, let us know

logankey121 · 03-07-2021, 12:05 PM

Car is still running awful, flashed to stock, drove for 30 miles, checked for codes again, I made sure to take coil out again and secure it.

thejeremyman9 · 03-07-2021, 01:44 PM

It's hard if not possible to tell anything from the datalog you captured. You also didnt give much context besides the fact that you flashed E30 tune before it started running bad...

Whats your full mod list? When did you install them? Right before tuning?

What stage map are you running? How did you target your ethanol mix? Did the car run fine for those few days on the E30 map before it started running bad? What happened right before it started running bad - did you do a pull and it hapepned right after? Or out of the blue?

The more information you provide the better our chances of being able to help.

03-06-2021, 02:53 PM	#1
logankey121 Registered 0 Rep 4 Posts Drives: 2015 BMW 335i Xdrive Join Date: Feb 2021 Location: North Dakota,USA iTrader: (0)	Car is running terribly, no codes- Datalog posted My car is a 2015 335 n55 with just under 70k miles. I tuned my car on e30 using BM3 and ran it for a few days before it started running terribly, I tuned it back to 91 and it is still running awful, not sure what to do. I checked cyl 1 spark plug and it looks good. https://www.bootmod3.net/log?id=6043...729b5a22cd14a8 Here is the Datalog from today. Thank you all for the help in advance!
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03-06-2021, 03:13 PM	#2
voxumf30 Private 13 Rep 57 Posts Drives: 2017 M2 Join Date: Feb 2019 Location: Clearwater iTrader: (0)	You use the correct gas for each of these tunes? Also why would cylinder 1 need to be checked and not the others? I can't read logs, just curious.
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03-06-2021, 04:48 PM	#3
LA1Z24 Captain 358 Rep 767 Posts Drives: 2014 435i M Sport Join Date: Oct 2020 Location: Long Island iTrader: (0)	Flash it back to stock then recheck for codes. We had some discussion a few weeks ago about BM3 not throwing codes. PTF of course denied BM3 would do this, but multiple people said it happened to them, including myself.
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03-06-2021, 06:29 PM	#5
logankey121 Registered 0 Rep 4 Posts Drives: 2015 BMW 335i Xdrive Join Date: Feb 2021 Location: North Dakota,USA iTrader: (0)	I will go back 100% to stock and try again.
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03-06-2021, 06:30 PM	#6
logankey121 Registered 0 Rep 4 Posts Drives: 2015 BMW 335i Xdrive Join Date: Feb 2021 Location: North Dakota,USA iTrader: (0)	I didn't mention that I checked cyl 1 spark plug prior to check for any issues before tuning, so I just wanted to check and see if I didn't accidentally not put it back correctly
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03-07-2021, 12:05 PM	#8
logankey121 Registered 0 Rep 4 Posts Drives: 2015 BMW 335i Xdrive Join Date: Feb 2021 Location: North Dakota,USA iTrader: (0)	Car is still running awful, flashed to stock, drove for 30 miles, checked for codes again, I made sure to take coil out again and secure it.
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03-07-2021, 01:44 PM	#9
thejeremyman9 Major General 4362 Rep 7,602 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	It's hard if not possible to tell anything from the datalog you captured. You also didnt give much context besides the fact that you flashed E30 tune before it started running bad... Whats your full mod list? When did you install them? Right before tuning? What stage map are you running? How did you target your ethanol mix? Did the car run fine for those few days on the E30 map before it started running bad? What happened right before it started running bad - did you do a pull and it hapepned right after? Or out of the blue? The more information you provide the better our chances of being able to help.
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