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codesx codesx is offline
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Car: 2008 335i Vert (E93, N54)
Default Do we all emit black smoke on start up? - 06-28-2019, 11:03 AM

My car runs a bit rich, though not bad at WOT.
Every start up, black smoke emits.
I know I need to replace the injectors, which is happening soon.

That said, I see the black (fuel, based on smell) on every start, even if just off for 1 minute. (Watching someone else start it. It can't be seen in rear view mirror)

I still have stock exhaust.

Typical when modded?
Just ignore it?

Or uncommon and likely to clear after injector replacement?

Thanks for the thoughts!


----

2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4 Map 6 | RACE BEF | 94 Octane | @19 PSI
BMS JB4 | BMS WMI @ 60/40 (CM10) | BMS 5" FMIC | BMS OCC | BMS DCI | BMS Cowel Filters
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
RB PCV Valve
NGK 5992 Plugs @ .020

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & T Stat
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Rushan's Avatar
Rushan Rushan is offline
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Join Date: May 2014
Car: 335i E92 2009
Default 06-29-2019, 03:34 AM

Never had a black smoke on startup, could be carbon build up? Any walnut blasting done? A friend bough a used e92 but it was buffing black smoke on flooring it I guess previous owner never floored it and used low grade fuel, an injector cleaner and few pulls cleared it all.


09 E92 335i - Hot-Climate Middle East package, M Sports suspension, 19" Rims, 6AT fully built internals, bushings, raybestos clutches and sonnax with xHP stage 3, Differential lockdown, New RB Turbo CHRA, JB4 - Map 3 70 adder with N20 TMAP - MHD BMS Race Flash with Tuned Duty Bais and PID - BMS Oil Cooler Valve - RB PCV - K&N DCI - AFE Air Scoops - 98 Super Fuel - WAGNER FMIC - 3" down's, RB Inlets- BMS charge pipe With Tial BOV - BMS Meth Kit with FSB, 30/70 Water/Meth on CM12 nozzle
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THE BEAST THE BEAST is offline
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Car: 2008 E93
Default 06-30-2019, 12:05 AM

Ummmm No.
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codesx codesx is offline
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Default 06-30-2019, 05:53 AM

Rubbish. I was hoping it was due to out tunes.
I do WOT many times a day and walnut blasting and liquid port cleaning done (ports visually look clean).

Will update after injector replacement.


----

2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4 Map 6 | RACE BEF | 94 Octane | @19 PSI
BMS JB4 | BMS WMI @ 60/40 (CM10) | BMS 5" FMIC | BMS OCC | BMS DCI | BMS Cowel Filters
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
RB PCV Valve
NGK 5992 Plugs @ .020

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & T Stat
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ifjd073 ifjd073 is offline
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Posts: 53
Join Date: Jul 2017
Car: 2007 BMW 335 (E90)
Default 06-30-2019, 08:34 AM

I throw out an unfortunate amount of soot in a liquid suspension on startup, which I attribute to startup richness. It's enough to make a fun little spray pattern on my garage door if I ever test fire - note that after I saw it once I never leave my garage door down for any reason when starting. That said, it doesn't smoke... Just does that for a minute or so.


'07 335 sedan, Stage 2 VVT, VVT inlets/outlets, VVT DCI, Phoenix CP with Tial BV, 3.5 bar TMAP sensor, Spec twin disk clutch with SMF, BMS OCC, RB PCV valve, ***less ***, VRSF catback with Vibrant *** installed, ETS 5" intercooler, Fuel-It stage 2 fuel pump, Fuel-It 650HP LPFP upgrade with 525 pump, JB4 with custom Trebila BEF, Phoenix PI intake manifold /w 550cc injectors, Fuel-it fuel lines, ethanol sensor and analyzer
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THE BEAST THE BEAST is offline
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Car: 2008 E93
Default 06-30-2019, 01:04 PM

Quote:
Originally Posted by codesx
Rubbish. I was hoping it was due to out tunes.
I do WOT many times a day and walnut blasting and liquid port cleaning done (ports visually look clean).

Will update after injector replacement.
I would lean towards injectors as well.
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rickz96 rickz96 is offline
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Car: e60 535Xi
Default 07-05-2019, 07:27 PM

Quote:
Originally Posted by ifjd073
I throw out an unfortunate amount of soot in a liquid suspension on startup, which I attribute to startup richness. It's enough to make a fun little spray pattern on my garage door if I ever test fire - note that after I saw it once I never leave my garage door down for any reason when starting. That said, it doesn't smoke... Just does that for a minute or so.
I second this...have the stains on my door as well.
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mrmax1984 mrmax1984 is offline
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Join Date: Mar 2016
Car: E92 335i
Default 07-09-2019, 01:43 PM

Could be oxygen sensors as well, if this is happening after the car warms up:

How I Diagnosed My Failed Oxygen (Air Fuel Ratio) Sensor - BMW DIY - YouTube
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funglenn funglenn is offline
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Car: 535Ix
Default 07-14-2019, 11:52 AM

i had a JB4 tune and no smoke, moved to COBB and no smoke at all.


2009 535i Xdrive Sport. Alpine White/Black Leather. JB4 G5, Dinan Exhaust. Escort Passport SRX laser jammer. Burger catch can, Sport SAT Transmission retrofit, Beyern Mesh Chrome Rims, CIC Retrofit
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THE BEAST THE BEAST is offline
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Car: 2008 E93
Default 07-14-2019, 12:15 PM

Quote:
Originally Posted by funglenn
i had a JB4 tune and no smoke, moved to COBB and no smoke at all.
So what your saying is, your car never smoked.
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codesx codesx is offline
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Car: 2008 335i Vert (E93, N54)
Default 07-15-2019, 09:28 AM

Quote:
Originally Posted by mrmax1984
Could be oxygen sensors as well, if this is happening after the car warms up:

How I Diagnosed My Failed Oxygen (Air Fuel Ratio) Sensor - BMW DIY - YouTube

Thanks. Very interesting video.


----

2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4 Map 6 | RACE BEF | 94 Octane | @19 PSI
BMS JB4 | BMS WMI @ 60/40 (CM10) | BMS 5" FMIC | BMS OCC | BMS DCI | BMS Cowel Filters
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
RB PCV Valve
NGK 5992 Plugs @ .020

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & T Stat
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(#12)
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codesx codesx is offline
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Posts: 651
Join Date: Feb 2018
Car: 2008 335i Vert (E93, N54)
Default 07-15-2019, 09:31 AM

Quote:
Originally Posted by funglenn
i had a JB4 tune and no smoke, moved to COBB and no smoke at all.

LOL. Who goes from JB4 to COBB?

P.S. You still have JB4 in your signature. I think I'm miss-reading a few things here


----

2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4 Map 6 | RACE BEF | 94 Octane | @19 PSI
BMS JB4 | BMS WMI @ 60/40 (CM10) | BMS 5" FMIC | BMS OCC | BMS DCI | BMS Cowel Filters
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
RB PCV Valve
NGK 5992 Plugs @ .020

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & T Stat
Reply With Quote
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