Water with black soot in exhaust
 

Just checked the rear of the car and the rear had black splash marks.

Checked the exhaust while it was running and it had clear water but some blackness in it.

The only mode is a flash ver 1.08. Only done 3158 km so far.

My old man said it was just CO2 burning off, and not worry.

Should I be worried or is he correct.

Normal. Water in exhaust means the catalyst system is working well. It then picks up the carbon in the exhaust as it exits and blows it on the car.

Yep, normal

Thanks, load of my head

One thing I've learned in life is to listen to the old dudes. They've been around and know more than you think.

First car or somthing? You should def listen to the oldman if thats the case.

All cars do this...Water (H2O) is a byproduct of the combustion of Hydrocarbons....along with CO (Carbon Monoxide) CO2 (Carbon Dioxide) C (Carbon) and NO2 (Nitrogen Dioxide) along with some other trace elements. I could go into the Stoichiometry of the whole thing...but that would require me to remember everything I learned in my Honors Chemistry class in High School...which for reasons (teacher was an asshole)...I'd rather not. @Visconti or one of the other tuners on the forum would most likely be able to explain it easier than me anyways. Basically water is produced in the combustion process which condenses as water vapor in the cooler exhaust sections of the car, that is the water vapor you see coming out of the exhaust. This is also the white vapor you see coming from car exhausts on cold days.

thats great news

I saw a mustang basically spewing water out of its exhaust. Same thing? Didnt seem like something good. But then again still learning about cars

Look at the results of the chemical process

http://upload.wikimedia.org/math/f/a...b992bd8586.png

Certain amount of H2O is produced.

The more fuel that is used (Higher Horsepower), the more water is produced, I've seen cars with a small steady stream of water coming from the exhaust.

Also the addition of Alcohol, Meth or Water into the fuel system using E85, Methanol or Water Injection will also affect how much water is produced in the combustion cycle. The only time it would be a problem is if there is large amounts of white smoke coming from the exhaust that doesn't dissipate quickly and has a funny smell. This indicates a blown head gasket...

a byproduct of an explosion in your car is water vapor. Once said vapor hits a cool-er surface it condesces causing it to pool up, and until reved up a bit it will sit there. Therefore, it's completely normal and will be more noticeable in the winter when there are greater differences between the hot engine/exhaust and the ambient temperature. In short, don't even worry...dat shit's coo.

Aware of the water byproduct in exhaust but was more worried about the black in the water and covering the rear in black

Its just carbon the vapor picks up from the pipes...totally normal.

the emission control on cars now is incredible. You are 10x more likely to die from carbon monoxide poisoning caused by a lawn mower or snow blower, than a car in a closed garage.

Better than a load on your head.

A large amount (relatively speaking) of unburned HC passes through the exhaust during cold starts. This is because the catalytic converter hasn't started working efficiently yet. Also, direct injected gasoline engines have higher soot/particulate emissions than port injected, especially with side-mounted direct injection. The unburned HC and the soot/particulates are where the black stuff comes from.

If you have the right gas analyzer, you can see it in realtime readings of HC concentration (ppm) or mass flow or in accumulated modal/bag data.

An example of just how much water be in an exhaust. A shot of my old hot rod launching at the strip. A complete custom dual exhaust but still running hi-flow cats. 10psi boost, methanol and nitrous.

http://i260.photobucket.com/albums/i...outlaunch1.jpg