Extra Soot At Startup?
 

So I've seen a few spots of black on my concrete in the garage lately and never thought anything of it, but heading to my car after work today, I noticed it was there and seems to be getting worse.
While its obviously not hurting anything I'm just wondering if there's anything I can do to fix this as I need to scrub it down every few days so not to stain the floor.

Anyone else ever have this problem?

Attachment 200006

Normal. For any car.

Well I understand the idea of soot, it's carbon etc etc. But it's only been the past few weeks I've seen it on the ground getting progressively worse. (It is coming into winter though)
And I've never had any of my other cars leave soot on the ground.

Ok, junior. Ill be nice.

Moisture in the exhaust at startup collects the exhaust particles and out they go.

There is no "fix".

Fair enough. Just something I'll live with then.

Thanks for the help @Raider; :)

Put something on the floor behind your car like a sheet of cardboard maybe.

All direct injected engines are soot cannons.

Wanna shoot major soot? Remove the cats in back. LOL

Catless.

http://images.tapatalk-cdn.com/15/05...441751127e.jpg

You will be dumping a lot of post injection on cold starts to heat up the catalysts (called a rapid heat up cycle); running that rich extra fuel = more soot. Simple as that.

Excellent. Glad someone else asked the question. I was wondering as well. Between no cats and the partial throttle on start-up....

I really was wondering about how coated the whole exhaust gets. Seems eventually it would close it's self off, but I'm hearing that's normal?

Ever since I got my MS3 I've been parking it in the same spot in my apartment complex, backed in, and the concrete curb thing has gotten a lot grayer looking in a specific area. This is with both cats installed. Imagine how much grayer they'll get when I go catless.

The exhaust will get coated pretty heavily, but it will not clog up enough to leach performance or close up entirely.

But I was just concerned about the excessive soot on the ground, as it's only started happening the past month, the other 6 months I owned the car t was never an issue. But I'm not worried about it now that I see other people have it.

I swear running Rotella has reduced 90% of my soot issue. Especially on the hatch, I don't have any idea what the mechanism for this could be, but it's real and is quite noticeable.

Hmm, that's odd, I've never had an issue with soot over my hatch (perhaps because I've got a black car?) but I've never been able to feel it over the back of my car.

Well it now looks like all you Jersey folk are going to jail


http://www.mazdaspeedforums.org/foru...jersey-188389/

I've run catless for about six years. Yeah, direct injection + catless dp/rp + running rich at WOT = heavy soot.

Some gets on the floor if you park in the same spot. Small price for performance. Live with it or get a sissy N/A csr.

Because mods?
I see no evidence of soot on my garage floor, now at 3 years.

This has to do with a lot of factors; it's a product of the combustion process in general. OEM maps may not give you quite as much soot as other maps (same goes with EGR VS no egr, what climate you live in, if you use the AC, etc etc etc etc).

Loads of it on my garage floor as well. Usually a bit heavier from the driver-side pipe. Stinks. Has a gas odour. I roll the neighbor's kids in it when they get on my nerves.

The funny part is the time I started the car in the garage with the door down. Nice black circle on the door (cat-less, no muffler, single exit Corksport)

Cold start bypass might help. Tap the accelerator pedal when the car's starting up.

There's no real fix that I'm aware of though.


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