Okay guys, seems to be kind of a weird issue. Wondering if you guys might be able to give me some options or places to look first that maybe myself, or friends have not thought of.

So it's a 2003 350z enthusiast. around 94k miles on it. Only engine mod I have is CAI, then exhaust I have test pipes.

I seem to have some whitish smoke coming from my exhaust. For the most part, it's when I stop at a light or sign, the smoke comes right when I stop, then nothing really. My buddy says smoke doesn't come out when I'm driving like on the freeway or city streets, and doesn't smell anything during then. When I go to get off the freeway, I hit the stop light and followed by a thin white smoke. but just like one wave.

Now when I hammer on the gas in lower gears, I notice some smoke coming out the exhaust. My buddy who runs his own shop, says it smells sort of like it's just running rich. But I don't think it's tuned. So not sure how that would happen?

Anyway, we have thought it could be a couple of things, maybe valve covers? fuel related? or piston rings (really hope not)..

Any ideas or input would be greatly appreciated! Thanks!

 

Sounds normal for test pipes

 

White smoke typically indicates antifreeze in the combustion chamber. A good place to start would be compression testing.

Keep us posted...

 

Okay I will check that out. I do notice some oil consumption. I want to say on average maybe like 1 qt for every 1000 miles. Not sure if that's normal. The amount fluctuates pending on how heavy my foot is. I think I'll start with compression test and then maybe even a leak down test if that doesn't solve anything?

Hope it's nothing too serious. Thanks.

 

Condensation? You would probably be able to smell it if it was antifreeze

 

Well doesn't happen just in the morning, and it's also fairly warm here as well. Don't think condensation would really happen unless it's super cold out, right?

 

[QUOTE=Rhev;10141561My buddy who runs his own shop, says it smells sort of like it's just running rich. [/QUOTE]

his mechanic smells something…but if he is running test pipes its most likely that...

I don't think it's condensation…condensation isnt a function of morning versus afternoon versus evening … it's a function of humidity and a difference in temperature.

I think the compression and leak down tests are the way to go -

 

Yeah compression test, leak down test, and next time you change your oil see if there is anything in the old stuff that seperates out, like antifreeze.

 

Thanks guys. I'm gonna be doing a compression test next week. And go from there. Maybe leak down after if need be.

Will compression tell me whether or not it's the rings or valve seals? I know leak down will say exactly which cylinder that has the leak in it.