b58 weird engine problem

bacon_45 · 06-07-2019, 10:14 PM

Hi all, it seems like my 340i with 12,000 miles is having some issues. The car doesn't feel like it pulls anymore, and the up-shift "farts" are not as loud as they used to be, which has caused me to worry a bit. I've reset adaptions, flashed to stock, back to stage 2 and its still the same. Any ideas? Only codes that come up are o2 sensors which I've had due to being catless. Any help would be greatly appreciated

G.Newt · 06-07-2019, 10:32 PM

Logs?

bacon_45 · 06-07-2019, 10:35 PM

Have not had the chance to do some logs, will do them tonight and post them

j1980mac · 06-07-2019, 10:47 PM

If you have an aftermarket cat, you could be slowly getting clogged up if you broke the material inside. Ask me how I know.

B58 · 06-08-2019, 02:47 AM

Quote:

Originally Posted by j1980mac

If you have an aftermarket cat, you could be slowly getting clogged up if you broke the material inside. Ask me how I know.

What tune are you running?

bacon_45 · 06-08-2019, 03:37 AM

That makes sense, it's an vrsf 4.5 catless dp. I'm running bm3. I barely beat a '19 gt stock where i've beat cars that gap a stock 19 gt....

j1980mac · 06-08-2019, 09:18 AM

Quote:

Originally Posted by B58

Quote:

Originally Posted by j1980mac

If you have an aftermarket cat, you could be slowly getting clogged up if you broke the material inside. Ask me how I know.

What tune are you running?

BM3 Stage 2 93

j1980mac · 06-08-2019, 09:21 AM

Quote:

Originally Posted by bacon_45

That makes sense, it's an vrsf 4.5 catless dp. I'm running bm3. I barely beat a '19 gt stock where i've beat cars that gap a stock 19 gt....

I don't think your problem is exhaust related if you're catless.

bacon_45 · 06-08-2019, 02:34 PM

Yep, gonna inspect the downpipe to make sure its installed correctly. Also putting back my stock airbox on and go on from there.

B58 · 06-08-2019, 11:23 PM

Quote:

Originally Posted by bacon_45

That makes sense, it's an vrsf 4.5 catless dp. I'm running bm3. I barely beat a '19 gt stock where i've beat cars that gap a stock 19 gt....

Shouldn't the BM3 delete the secondary o2 fault code? Are you getting a fault code for the primary o2 sensor (lambda) ?

teknic90 · 06-14-2019, 07:44 AM

I feel like I'm in the same boat. I have the exact same mods and at first the car felt great and pulled hard. Over time I feel that the tune has become less aggressive?

:

j1980mac · 06-14-2019, 08:28 AM

Quote:

Originally Posted by teknic90

I feel like I'm in the same boat. I have the exact same mods and at first the car felt great and pulled hard. Over time I feel that the tune has become less aggressive?

:

Has your environmental factors changed? After all it is summer.

EricVR4 · 06-14-2019, 08:35 AM

Quote:

Originally Posted by teknic90

I feel like I'm in the same boat. I have the exact same mods and at first the car felt great and pulled hard. Over time I feel that the tune has become less aggressive?

:

Quote:

Originally Posted by j1980mac

Has your environmental factors changed? After all it is summer.

First things first, log the car and have a look to see what it's doing.

It could also just be that you're getting used to the tune as well. Flash it back to stock and drive it for a little and then put the tune back on and see what you think.

teknic90 · 06-14-2019, 11:42 AM

Quote:

Originally Posted by EricVR4

Quote:

Originally Posted by teknic90

I feel like I'm in the same boat. I have the exact same mods and at first the car felt great and pulled hard. Over time I feel that the tune has become less aggressive?

:

Quote:

Originally Posted by j1980mac

Has your environmental factors changed? After all it is summer.

First things first, log the car and have a look to see what it's doing.

It could also just be that you're getting used to the tune as well. Flash it back to stock and drive it for a little and then put the tune back on and see what you think.

Yes. Need to do both of these. Just haven't had the time to log.

bacon_45 · 06-14-2019, 05:42 PM

Teknic90, I am going to change my spark-plugs, mine have 10k of hard driven behind them which can explain the sluggish feeling? hopefully its that.
Here's a log I did, for those who can read them i'd greatly appreciate if you guys can help me out!
http://www.bootmod3.net/log?id=5d02120dc090c642819c90a7

riskmaker76 · 06-14-2019, 09:45 PM

Your hitting your target of 16 psi and holds at 100% throttle... no closures ... timing is holding also at 11 degrees. No knock

Logs look perfect

Next time just start at 3k then floor it up to near red line

Quote:

Originally Posted by bacon_45

Teknic90, I am going to change my spark-plugs, mine have 10k of hard driven behind them which can explain the sluggish feeling? hopefully its that.
Here's a log I did, for those who can read them i'd greatly appreciate if you guys can help me out!
http://www.bootmod3.net/log?id=5d02120dc090c642819c90a7

SoCalCarGuy · 06-14-2019, 10:36 PM

Quote:

Originally Posted by riskmaker76

Your hitting your target of 16 psi and holds at 100% throttle... no closures ... timing is holding also at 11 degrees. No knock

Logs look perfect

Next time just start at 3k then floor it up to near red line

agreed...also to the OP. You're getting used to the power. time to upgrade the turbo and add meth.

I used to drive a 600whp cobra and got used to the power and wanted more. People who would ride shotgun were scared for their lives, but power is addicting.

bacon_45 · 06-14-2019, 11:12 PM

Thanks fellas, much appreciated. do y'all think maybe spark plugs could fix that little hesitation I feel?

teknic90 · 06-14-2019, 11:39 PM

Quote:

Originally Posted by SoCalCarGuy

Quote:

Originally Posted by riskmaker76

Your hitting your target of 16 psi and holds at 100% throttle... no closures ... timing is holding also at 11 degrees. No knock

Logs look perfect

Next time just start at 3k then floor it up to near red line

agreed...also to the OP. You're getting used to the power. time to upgrade the turbo and add meth.

I used to drive a 600whp cobra and got used to the power and wanted more. People who would ride shotgun were scared for their lives, but power is addicting.

I think that's what I am missing. I had my N54 335i FBO running 70% e85 and it felt like it had more power than this stage two...

06-07-2019, 10:14 PM	#1
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	b58 weird engine problem Hi all, it seems like my 340i with 12,000 miles is having some issues. The car doesn't feel like it pulls anymore, and the up-shift "farts" are not as loud as they used to be, which has caused me to worry a bit. I've reset adaptions, flashed to stock, back to stage 2 and its still the same. Any ideas? Only codes that come up are o2 sensors which I've had due to being catless. Any help would be greatly appreciated
	Appreciate 0 Tweet Quote

06-07-2019, 10:32 PM	#2
G.Newt Major 810 Rep 1,454 Posts Drives: CT4-V Blackwing 6MT Join Date: Feb 2017 Location: CO -> TX iTrader: (0)	Logs?
	Appreciate 0 Quote

06-07-2019, 10:35 PM	#3
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	Have not had the chance to do some logs, will do them tonight and post them
	Appreciate 0 Quote

06-07-2019, 10:47 PM	#4
j1980mac Captain 263 Rep 964 Posts Drives: 2018 X3 M40i Join Date: Apr 2018 Location: Austin TX iTrader: (0)	If you have an aftermarket cat, you could be slowly getting clogged up if you broke the material inside. Ask me how I know.
	Appreciate 0 Quote

06-08-2019, 03:37 AM	#6
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	That makes sense, it's an vrsf 4.5 catless dp. I'm running bm3. I barely beat a '19 gt stock where i've beat cars that gap a stock 19 gt....
	Appreciate 0 Quote

06-08-2019, 02:34 PM	#9
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	Yep, gonna inspect the downpipe to make sure its installed correctly. Also putting back my stock airbox on and go on from there.
	Appreciate 0 Quote

06-14-2019, 07:44 AM	#11
teknic90 Lieutenant 99 Rep 565 Posts Drives: G20 M340i Join Date: Jun 2012 Location: Dallas, TX iTrader: (13) Garage List 2020 G20 M340i [0.00] 2016 BMW 340i [0.00]	I feel like I'm in the same boat. I have the exact same mods and at first the car felt great and pulled hard. Over time I feel that the tune has become less aggressive? :
	Appreciate 0 Quote

06-14-2019, 05:42 PM	#15
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	Teknic90, I am going to change my spark-plugs, mine have 10k of hard driven behind them which can explain the sluggish feeling? hopefully its that. Here's a log I did, for those who can read them i'd greatly appreciate if you guys can help me out! http://www.bootmod3.net/log?id=5d02120dc090c642819c90a7
	Appreciate 1 teknic9098.50 Quote

06-14-2019, 11:12 PM	#18
bacon_45 Private 42 Rep 94 Posts Drives: 2018 340i BM3 FBO Join Date: Feb 2017 Location: San Diego, CA iTrader: (0)	Thanks fellas, much appreciated. do y'all think maybe spark plugs could fix that little hesitation I feel?
	Appreciate 0 Quote