Smoke From Exhaust

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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islandtuner242
Posts: 123
Joined: Sun Oct 31, 2010 7:54 am
Car: 1990 Nissan 300zx N/A 2+2 SOLD!!!
2003 Infiniti G35
Location: Freeport, Grand Bahama

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started the Z and noticed some smoke coming out of the exhaust it's not that hard of a white but white is the only color i can say it looks the most like.... i don't see anything leaking anywhere and it's driving me crazy any ideas anyone


Thanks In Advance,
Kadeem


robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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If the engine is cold, it's normal to have a white smoke which is condensation burning off until engine and exhaust warms up to temp.

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dantesdoom
Posts: 270
Joined: Wed Mar 04, 2009 7:28 am
Car: 1991 Nissan 300zx N/A
1997 Nissan Pickup

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Is it cold outside? Did you use seafoam? If it smells sweet, it could be coolant, which is not good. My car will do this if i dont drive it that often, but its just the condensation built up in my pipes and it goes away after a couple of minutes. So, does it do this all the time, like during you entire time driving, even after the car is warm and been running a while?

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islandtuner242
Posts: 123
Joined: Sun Oct 31, 2010 7:54 am
Car: 1990 Nissan 300zx N/A 2+2 SOLD!!!
2003 Infiniti G35
Location: Freeport, Grand Bahama

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well this is onlye the second time i've actually had the car running since i got it back but i'm gonna start it up tomorrow and let it run for a while to see if anything changes....

@dantesdoom no it wasn't cold outside it was probably in the 90's that day

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dantesdoom
Posts: 270
Joined: Wed Mar 04, 2009 7:28 am
Car: 1991 Nissan 300zx N/A
1997 Nissan Pickup

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id bet it was just condensation, keep us updated

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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It's all in the smell/ color.

Sweet:Coolant.
Gas: Running extremely rich, to the point of unburnt fuel escaping to the exhaust
"Burnt": Oil.

White: Coolant, possibly gas.
Blue: oil.

User avatar
islandtuner242
Posts: 123
Joined: Sun Oct 31, 2010 7:54 am
Car: 1990 Nissan 300zx N/A 2+2 SOLD!!!
2003 Infiniti G35
Location: Freeport, Grand Bahama

Post

well i ran the car and the smoke stopped coming out but when i had my hand behind the exhaust i found some black substance coming out..... it felt like water but was black, with no scent

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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That's just condensation mixing with the soot from your exhaust. Nothing to worry about.

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islandtuner242
Posts: 123
Joined: Sun Oct 31, 2010 7:54 am
Car: 1990 Nissan 300zx N/A 2+2 SOLD!!!
2003 Infiniti G35
Location: Freeport, Grand Bahama

Post

Thanks @Ace2cool........ think imma do a doughnut or two tomorrow :woot: :dblthumb:


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