Hey Guys.i drive a 04 g coupe..I got into my car tonight started it up and warmed it up for about 30 seconds...I put it in drive and began to drive..I came up to a stop light about a mile away, when all of a sudden i see smoke coming out of my exhaust(left side if you look at car from behind) while i was stopped...and the reason why i am worried is because the smoke took a very long time to stop....about 1 to 1.30 min...It's 62 degrees here so i don't think the weather has something to do with it. Does anybody what the problem is....should i worry???? Thanks

 

rings could be going bad.. i would def get it checked out. the sooner the better

 

what color was the smoke? 62 is not warm especially with a wind chill. Sounds like the weather.....

 

That's freaky, but when this occurred your coupe must have been running crappy....right? Something made one side quit or at least part of it. I'd take it in to Nissan since your warranty is probably long gone and they charge less than Infiniti. I don't know maybe a wasted coil pack would cause what you're describing or a plugged injector....
Gary

 

The smoke color was white.and it was running great..before.and after it happened.

 

white?? at least it aint black smoke.. might be in the good... maybe something like maf or something small as a fuel filter thats stopped up

 

Cold damp air meets hot dry air from the engine = condensation


Its most likely just that.

 

A plugged fuel filter wouldn't make the exhaust smoke white... it would mostly make the car run rough(stutter), possibly ping a bit, and stall.


To the OP:

Did you get a bunch of rain the night before or have a real low dewpoint at night? You may have just had a ton of condensation in your exhaust that was burning off as the system warmed up.

Could differentiate from the look and/or smell of the "smoke" if it was just steam or actual smoke? Did the "smoke" have a fishy smell?... Have you checked your coolant level and motor oil level lately?

 

I thought:

Black = Good, Combustion
White = Bad, Water and oil burning
Blue = Bad, oil burning

Am i wrong?

 

You are mostly correct. A lot of Jet Black smoke means you are running rich and not burning all the gas during combustion. White is Smoke from oil, Blue is coolant. Steam is straight water if you run straight water in the radiator as some rednecks do.

 

could be that it was cold out so you could see your exhaust and the wind was blowing it to a single side and you saw it in your mirror? happens to me a lot

 

got two backwards..

Blueish is oil burning

white is coolant and has a sweet smell

black is incorrect AFR

there also is grey smoke...to little fuel



Anybody running just water in their g35 should give their car to me and go back to a honda.

 

im thinking it was condensation as well... 62 degrees in the morning? So it must have been colder earlier that morning?

 

It most likely is condensation, and alil bit of smoke or condensation upon start up at a cool temp will happen, its normal.