N54Tech.com - International Turbo Racing Discussion
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n54teek n54teek is offline
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Default Smoke smoke smoke smoke smoke - 08-01-2016, 02:38 AM

Hey guys,

Iv got some smokey stuff going on with my n54 335i

Mods are fbo inc ********* jb4 mhd stock turbos stock pcv no-occ

Here's a little vid, unplugging vac canisters makes no difference to the smoke.
http://youtu.be/4QSiQ5U7NPA
I notice smoke when coming to a stop or when driving at around 1500 rpm to about 2000 rpm.

What can I do to rule out turbos? Or valve stem seals ?

Or should I just throw on the oem *** and enjoy my life?


2007 | BMW | E90 | 335i | M Sport | N54 | JB4 G5 ISO | 2 STEP NLS RELAY | MHD BACK END RACE FLASH | OEM BOSCH SPARK PLUGS | BMS DCI | VRSF ** | PE EXHAUST MOD | NORTH EAST ENGLAND | UK |
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dotCEO dotCEO is offline
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Default 08-01-2016, 10:23 AM

By any chance do you use the Exhaust Burble option for when you lift on MHD???


7DCT 2013 LeMans Blue BMW ///335is (Pending Inspection)
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ricecrackers101 ricecrackers101 is offline
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Default 08-01-2016, 11:57 AM

i have the same problem. the smoke is at its worst after prolonged light throttle at 1500-2000rpm. it started happening after i used the 2stepca few times. and i have also noticed oil in my chargepipe. most likely tge turbos failing for me
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ms335i ms335i is offline
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Default 08-01-2016, 12:51 PM

I've been through this, it's the turbos.
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Default 08-02-2016, 01:42 AM

Quote:
Originally Posted by dotCEO
By any chance do you use the Exhaust Burble option for when you lift on MHD???
I do use the burble feature, but have not set it to be aggressive as it sounds like a machine gun. Scares all the grannys, so to avoid having to deal with randon people having heart attacks its turned down for now.


2007 | BMW | E90 | 335i | M Sport | N54 | JB4 G5 ISO | 2 STEP NLS RELAY | MHD BACK END RACE FLASH | OEM BOSCH SPARK PLUGS | BMS DCI | VRSF ** | PE EXHAUST MOD | NORTH EAST ENGLAND | UK |
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Default 08-02-2016, 01:45 AM

Dont fancy changing turbos like.... Ill install the factory cats soon and see if the smoke goes away.


2007 | BMW | E90 | 335i | M Sport | N54 | JB4 G5 ISO | 2 STEP NLS RELAY | MHD BACK END RACE FLASH | OEM BOSCH SPARK PLUGS | BMS DCI | VRSF ** | PE EXHAUST MOD | NORTH EAST ENGLAND | UK |
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K.Jameel K.Jameel is offline
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Default 08-02-2016, 03:12 AM

Quote:
Originally Posted by n54teek
Hey guys,

Iv got some smokey stuff going on with my n54 335i

Mods are fbo inc ********* jb4 mhd stock turbos stock pcv no-occ

Here's a little vid, unplugging vac canisters makes no difference to the smoke.
http://youtu.be/4QSiQ5U7NPA
I notice smoke when coming to a stop or when driving at around 1500 rpm to about 2000 rpm.

What can I do to rule out turbos? Or valve stem seals ?

Or should I just throw on the oem *** and enjoy my life?
It's most probably turbos' i had the same issue and when i unplugging vac canisters makes a huge difference big clouds of smoke.


BMW 335i '08 E92 N54, JB4 G5 IOS, BMS DCI, VRSF ***, BMS-Tial BOV Kit with Chargepipe, VRSF FMIC, BMS Meth Kit, JB4 MHD BEF, BMS PCV valve, BMS OCC. TCU Alpina_B3 Flash, .
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ryanm8 ryanm8 is offline
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Default 08-02-2016, 05:43 PM

In my experience, valve stem seals don't smoke like that. If they are shot you will get smoke when coming to a stop at a red light, or when accelerating from a stop. Nothing at idle.

I think it's the turbos too.
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K.Jameel K.Jameel is offline
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Default 08-03-2016, 02:13 AM

Quote:
Originally Posted by ryanm8
In my experience, valve stem seals don't smoke like that. If they are shot you will get smoke when coming to a stop at a red light, or when accelerating from a stop. Nothing at idle.

I think it's the turbos too.
Even though at idle will smoke it's depend on how bad they are i had my valve stem seals replaced due lightly smoking at idle and issue gone. now my turbos as will.
if you want to make sure you can floor the gas pedal to the max and check if there is smoke and when the car is cold if you turn it on it will smoke.


BMW 335i '08 E92 N54, JB4 G5 IOS, BMS DCI, VRSF ***, BMS-Tial BOV Kit with Chargepipe, VRSF FMIC, BMS Meth Kit, JB4 MHD BEF, BMS PCV valve, BMS OCC. TCU Alpina_B3 Flash, .
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ricecrackers101 ricecrackers101 is offline
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Default 08-03-2016, 02:21 AM

if i leave my car in neutral and hold the rpm at 1500 after about 10-20 seconds huge clouds start pouring out the exhaust. does that sound more likely to be the turbos, or the valve stem seals? no smoke during a cold start, or at steady idle, only when coming to a stop or when under light throttle at about 1500rpm

Last edited by ricecrackers101; 08-03-2016 at 02:26 AM..
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K.Jameel K.Jameel is offline
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Default 08-03-2016, 02:30 AM

Quote:
Originally Posted by ricecrackers101
if i leave my car in neutral and hold the rpm at 1500 after about 10-20 seconds huge clouds start pouring out the exhaust. does that sound more likely to be the turbos, or the valve stem seals? at steady idle theres no smoke, only when coming to a stop or when under light throttle at about 1500rpm
Most probably turbos, valve stem once the engine warms up it will slightly smoke, you can check your turbo first for any leaking symptoms.


BMW 335i '08 E92 N54, JB4 G5 IOS, BMS DCI, VRSF ***, BMS-Tial BOV Kit with Chargepipe, VRSF FMIC, BMS Meth Kit, JB4 MHD BEF, BMS PCV valve, BMS OCC. TCU Alpina_B3 Flash, .
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Default 08-03-2016, 06:51 AM

Quote:
Originally Posted by n54teek
I do use the burble feature, but have not set it to be aggressive as it sounds like a machine gun. Scares all the grannys, so to avoid having to deal with randon people having heart attacks its turned down for now.
My car started to smoke like a B**ch when I used the burble feature. My car is in 100% operating condition with brand spanking new turbos... I took that burble business off, and after probably a week, my car went back to normal not smoking at all... so to test, I put the burble again, and boom... here comes the smoke.


I took it off, and my smoke is almost gone again... I also panicked and thought it was the valve seals, but nope... at least in my case, it was the 5 second burble left at the soft setting...

I run E85 full C@t delete from *** out, and my car usually smells like corn, but with the burble it smells like oil.

In conclusion, try taking it off, run for a while and see if it goes away because both times, mine did completely. Now it's back to smelling like corn.


7DCT 2013 LeMans Blue BMW ///335is (Pending Inspection)
6AT | 135i ///M Sport - CRASHED (TOTALLED)

Last edited by dotCEO; 08-03-2016 at 06:57 AM..
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BostonBeemah BostonBeemah is offline
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Default 08-03-2016, 07:55 AM

Quote:
Originally Posted by dotCEO
My car started to smoke like a B**ch when I used the burble feature. My car is in 100% operating condition with brand spanking new turbos... I took that burble business off, and after probably a week, my car went back to normal not smoking at all... so to test, I put the burble again, and boom... here comes the smoke.


I took it off, and my smoke is almost gone again... I also panicked and thought it was the valve seals, but nope... at least in my case, it was the 5 second burble left at the soft setting...

I run E85 full C@t delete from *** out, and my car usually smells like corn, but with the burble it smells like oil.

In conclusion, try taking it off, run for a while and see if it goes away because both times, mine did completely. Now it's back to smelling like corn.
Huh now thats interesting. Just trying to understand what would cause that to happen..


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Torgus Torgus is offline
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Default 08-03-2016, 08:23 AM

very interesting...I have the burble on but it has gotten much MUCH quieter recently and my oil light just turned on for the 1st time in owning the car. I have not noticed much smoke if any. Now I am wondering if these are related.


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Default 08-03-2016, 08:49 AM

Quote:
Originally Posted by BostonBeemah
Huh now thats interesting. Just trying to understand what would cause that to happen..
Quote:
Originally Posted by Torgus
very interesting...I have the burble on but it has gotten much MUCH quieter recently and my oil light just turned on for the 1st time in owning the car. I have not noticed much smoke if any. Now I am wondering if these are related.
Yea, I got my +1 Oil light 3 days after adding 1ltr of oil... since I turned it off, I'm not cooking through oil as I was.

Once we get a few more confirmation, then we'll conclude that that burble business is dumping extra fuel and oil causing this scary issue


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Torgus Torgus is offline
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Default 08-03-2016, 09:36 AM

Quote:
Originally Posted by dotCEO
Yea, I got my +1 Oil light 3 days after adding 1ltr of oil... since I turned it off, I'm not cooking through oil as I was.

Once we get a few more confirmation, then we'll conclude that that burble business is dumping extra fuel and oil causing this scary issue
Interesting...I think I will take it off today just not worth it.


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austin austin is offline
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Default 08-04-2016, 11:35 AM

These DI engines supposedly have issues with fuel dilution, the burble button could be making it worse. A couple of UOA labs identified the fuel dilution problem in the BITOG forum a while back for these cars and some Audis. I don't think the problem is the catastrophe that some made it out to be, because there are plenty of N54s with high mileage cruising around still. But it wouldn't surprise me if dumping fuel into the engine while the crankcase is in vacuum would cause even more fuel to get past the rings into the oil, thinning it out and causing it to get consumed more quickly.

Of course I've never tested the crankcase pressure on my car, but I imagine that while engine braking these things pull more vacuum on the crank case than any other time. Has anyone tested this?

I've even wondered if fuel dilution is part of the reason BMW designed these engines to keep oil temps in the 230-240 range all the time, to boil the fuel out more quickly.

I crew chief for a drag race boat, and we need to boil the methanol out of the oil every pass. So I am no stranger to the issues related to fuel dilution lol. Many teams just send it straight to the recycler.

Last edited by austin; 08-04-2016 at 11:36 AM.. Reason: typo
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DaZuc DaZuc is offline
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Default 08-09-2016, 07:27 PM

You're car vapes no big deal.

No but on a serious note, I may take of the burble option then as well if this is what happens.
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Default 08-11-2016, 01:38 AM

Probably turbo(s). As it gets worse coming to a stop and if vacuum unplugged it is probably turbo seals that seal when under load but not at idle/low load. At least that is my theory for my turbo(s). Making sure to have idle/low load WG duty cycle set high (opposite of "WG rattle fix") reduced/cleared my smoking issues, but they were not too bad. Best fix was turbo upgrade though. =P
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krukedking krukedking is offline
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Default 08-11-2016, 09:29 AM

are we sure its not the pcv valve or the hose for the pcv valve??


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krukedking krukedking is offline
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Default 08-11-2016, 02:24 PM

so i figured out if you put it in nuetral while coming to a stop, my car wont smoke. i have the exact problem as you, no smoke on acceleration at all even at 17-18 psi.


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Default 08-11-2016, 03:23 PM

Just some new info.

I have been experimenting and what I've done so far is

1. cable tied vac lines

2. Menu 10, moved up to around 4k rpm (wastegate rattle set to more rattle)

No more smoke.

As soon as I put menu 10 below 1K, the smoke starts again.

vacuume related problem for me, but how is that possible ?


2007 | BMW | E90 | 335i | M Sport | N54 | JB4 G5 ISO | 2 STEP NLS RELAY | MHD BACK END RACE FLASH | OEM BOSCH SPARK PLUGS | BMS DCI | VRSF ** | PE EXHAUST MOD | NORTH EAST ENGLAND | UK |
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krukedking krukedking is offline
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Default 08-11-2016, 03:31 PM

Quote:
Originally Posted by n54teek
Just some new info.

I have been experimenting and what I've done so far is

1. cable tied vac lines

2. Menu 10, moved up to around 4k rpm (wastegate rattle set to more rattle)

No more smoke.

As soon as I put menu 10 below 1K, the smoke starts again.

vacuume related problem for me, but how is that possible ?



my suggestion is to get an rb pcv valve and new hose. thats what im gonna try for mine.


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krukedking krukedking is offline
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Default 08-23-2016, 06:55 AM

any word on fixes???


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Trinispec Trinispec is offline
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Default 08-23-2016, 07:07 AM

Quote:
Originally Posted by ms335i
I've been through this, it's the turbos.
turbos, I also had this problem.
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