Gas coming out of exhaust on a cold start

jetblackcoupe · 10-09-2012, 04:20 PM

I have procede v5, dci, catless dp's.... Idle is rough as usual but I've been noticing that it's spitting raw gas out of the exhaust (usually only on the initial startup, sometimes afterwards too) ... What could this mean?

ksalih · 10-09-2012, 04:36 PM

Quote:

Originally Posted by jetblackcoupe

I have procede v5, dci, catless dp's.... Idle is rough as usual but I've been noticing that it's spitting raw gas out of the exhaust (usually only on the initial startup, sometimes afterwards too) ... What could this mean?

How sure are you its gas??...sounds like water / condensation

JamesM3M5 · 10-09-2012, 04:43 PM

Yep, that's just water. The exhaust is always full of water - natural product of combustion - and it blows out in liquid form when the exhaust is cold. Once it heats up, you won't see any liquid, it will all be vapor.

jetblackcoupe · 10-09-2012, 06:14 PM

smelled like gas so i assumed it was gas

marv85 · 10-09-2012, 06:15 PM

It's water, my car does the same.

Javier · 10-09-2012, 07:09 PM

put a match to it and see

WilliamS · 10-09-2012, 07:54 PM

Quote:

Originally Posted by Javier

put a match to it and see

You gonna light this or what!

best idea ever.

Although it is just water.

Jeller · 10-09-2012, 09:42 PM

When my injectors went my car was spitting fuel out the exhaust, I was told that a couple of the injectors got stuck open. Idle was super rough, like running on 2 cylinders kinda rough.

jetblackcoupe · 10-09-2012, 09:45 PM

Quote:

Originally Posted by Jeller

When my injectors went my car was spitting fuel out the exhaust, I was told that a couple of the injectors got stuck open. Idle was super rough, like running on 2 cylinders kinda rough.

Did that only happen on cold starts or at all times?

x800pro6 · 12-18-2012, 05:55 AM

definatly injectors stuck upen!! find out which injectors are missfiring and have them replaced imidiatly. be caurfull as may hydrolock causing cylinder/rod damage! so dont drive. problem should go away after waiting and a few starts of motor. i had same problem, its getting fixed now, it dosent happen all the time, only some cold starts after the car has been thrashed, so if its been thrashed on friday night, on saurday it will play up. the problem fixes itself once engine warmes up. you should be getting a low fuel pressure code aswell but dont worry fuel pump should be fine unless car has long cranks. low pressure fuel code is caused by injector just dumping fuel constantly spraying at full ball relieving too much fuel pressure out of the fuel rail. and obviously with too much fuel car wont ignight fuel therefore missfire. and it will sound like V8

anyways hope u fixed your problem

Kolyan2k · 12-18-2012, 07:07 AM

Taste/drink it. Nothing will happen to you, happens all the time when you try to suck gasoline out of gas tank

DrAmazing · 12-18-2012, 07:12 AM

Quote:

Originally Posted by Kolyan2k

Taste/drink it. Nothing will happen to you, happens all the time when you try to suck gasoline out of gas tank

I wouldn't even want to taste water that made its way through my exhaust.

Jeller · 12-18-2012, 07:33 AM

Quote:

Originally Posted by jetblackcoupe

Did that only happen on cold starts or at all times?

It only happened really bad once, had a couple hiccups prior to the last time, but it would come and go, after that I took it to the dealer and got all new injectors. Keep in mind it was a really really rough idle, you will know it for sure when/if it happens.

hemi to e90 · 12-18-2012, 04:27 PM

Quote:

Originally Posted by jetblackcoupe

smelled like gas so i assumed it was gas

arent you catless?

Wedge1967 · 12-18-2012, 09:10 PM

Quote:

Originally Posted by marv85

It's water, my car does the same.

Is that before or after it back fires.

Oh, my bad... It's just your Vishnu Exhaust making noises.

5soko · 12-18-2012, 09:47 PM

when my injector failed, I got gas out of my exhaust.

10-09-2012, 04:20 PM	#1
jetblackcoupe Captain 150 Rep 767 Posts Drives: 2008 e92 335i 6MT Join Date: Apr 2011 Location: NJ iTrader: (2)	I have procede v5, dci, catless dp's.... Idle is rough as usual but I've been noticing that it's spitting raw gas out of the exhaust (usually only on the initial startup, sometimes afterwards too) ... What could this mean?
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10-09-2012, 04:43 PM	#3
JamesM3M5 Some dude 91 Rep 1,780 Posts Drives: E92 335i Join Date: Sep 2011 Location: Northern VA iTrader: (0)	Yep, that's just water. The exhaust is always full of water - natural product of combustion - and it blows out in liquid form when the exhaust is cold. Once it heats up, you won't see any liquid, it will all be vapor. __________________ RRT E92 335i/6MT with stuff and things
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10-09-2012, 06:14 PM	#4
jetblackcoupe Captain 150 Rep 767 Posts Drives: 2008 e92 335i 6MT Join Date: Apr 2011 Location: NJ iTrader: (2)	smelled like gas so i assumed it was gas
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10-09-2012, 06:15 PM	#5
marv85 Colonel 70 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	It's water, my car does the same. __________________ '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT COBB, FBO, st2 LPFP, Mfactory LSD \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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10-09-2012, 07:09 PM	#6
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	put a match to it and see __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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10-09-2012, 09:42 PM	#8
Jeller Lieutenant 15 Rep 506 Posts Drives: 2007 335i E90 ZSP Join Date: Oct 2008 Location: Buffalo NY iTrader: (5)	When my injectors went my car was spitting fuel out the exhaust, I was told that a couple of the injectors got stuck open. Idle was super rough, like running on 2 cylinders kinda rough.
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12-18-2012, 05:55 AM	#10
x800pro6 ZEE DEE 15 Rep 62 Posts Drives: 335i Join Date: May 2012 Location: Melbourne Australia iTrader: (0)	definatly injectors stuck upen!! find out which injectors are missfiring and have them replaced imidiatly. be caurfull as may hydrolock causing cylinder/rod damage! so dont drive. problem should go away after waiting and a few starts of motor. i had same problem, its getting fixed now, it dosent happen all the time, only some cold starts after the car has been thrashed, so if its been thrashed on friday night, on saurday it will play up. the problem fixes itself once engine warmes up. you should be getting a low fuel pressure code aswell but dont worry fuel pump should be fine unless car has long cranks. low pressure fuel code is caused by injector just dumping fuel constantly spraying at full ball relieving too much fuel pressure out of the fuel rail. and obviously with too much fuel car wont ignight fuel therefore missfire. and it will sound like V8 anyways hope u fixed your problem
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12-18-2012, 07:07 AM	#11
Kolyan2k Major General 920 Rep 5,538 Posts Drives: 2006 S2000 Join Date: Apr 2010 Location: Boston iTrader: (1)	Taste/drink it. Nothing will happen to you, happens all the time when you try to suck gasoline out of gas tank
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12-18-2012, 09:47 PM	#16
5soko Brigadier General 333 Rep 4,632 Posts Drives: M5 Join Date: Aug 2007 Location: Brooklyn, NY iTrader: (4)	when my injector failed, I got gas out of my exhaust. __________________ Current: E63S AMG 4matic RENNtech \|\| M5 Evolve..Eventuri \|\| F10 LCI 535i MHD
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