Blowing Smoke

[Tebie]

h all

just wondering if someone could tell me whats going on here...

when i drive normally i dont blow smoke but when i boot it this light brown coloured smoke pours out only once the revs get higher, like around 6000rpm...

it does it in 1st, 2nd and not so much in 3rd gears

power doesnt drop or anything, just this huge amount of light brown smoke pouring out my exhaust...

any help or suggestions would be great

thanks

chris

[mad082]

its fuel smoke. if you watch the v8 stupidcars you will see it when they change gears on acceleration, and on decel when they give it some gas on down shifts.

[Tebie]

even with such large amounts of smoke?

[mad082]

easy way to know for sure if it is fuel smoke is to stick it on the dyno and get the air/fuel ratio checked.

your o2 sensor may be stuffed and making it run supper rich.

Edited September 24, 2006 by mad082

[Munkyb0y]

i dont think 02 sensor has much to do with anything at 6000rpm.

as far as i can tell, o2 sensor only matters at cruise/light throttle.

[The Mafia]

i dont think 02 sensor has much to do with anything at 6000rpm.

as far as i can tell, o2 sensor only matters at cruise/light throttle.

on the money

[Tebie]

i would like to check the o2 though...

just to be safe

[race_snooze]

i was under the impression that light brown smoke was infact coolent. Black is fuel, white is oil.

Check your raidator for oil, just pull the cap off and check for oil.

Also check under oil cap for white foaming (water in oil)

[ish]

Light brown Smoke is usually exhaust dust ! It usualy form's in cars that arnt driven very hard or the breakdown of materials in the muffler from heat and corsion over time.

the smokes

Blue = burnt oil

Black = fuel

White steamy vapour = water

White steamy strange smelling = coolant

White sticky hovering vapour = unburnt oil

Brown exhaust = dust

Pretty blue and pink = Autotrans

Has the car been sitting for along time with out a good hard drive ?

Edited September 25, 2006 by ishh

[The Mafia]

lol - exhaust dust.

Chocolate coloured smoke is when your AFR's are pretty much spot on. Every car does it under load.

[ish]

lol Chocolate colored smoke

[The Mafia]

well, its definately not "exhaust dust" mate..

heh that made me chuckle.

[Tebie]

Has the car been sitting for along time with out a good hard drive ?

the car never sits around for days on end

and it always gets a good thrashing every now and then...

[kjb_r33]

Brown smoke is actually oxides of nitrogen, created from combustion temperatures. HIgher load equals higher combustions temps and BROWN smoke.

[Tebie]

that actually makes sense...