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-   -   Soot in Exhaust...Normal? (https://www.ft86club.com/forums/showthread.php?t=97969)

MasonL1997 11-22-2015 11:16 PM
Soot in Exhaust...Normal?
 
2 Attachment(s)
Hi everyone,

Ive had the car for just over 3 months and am the second owner with the car currently having 31 thousand kilometers. Now, when ever i go WOT and get out of the car after driving, i look at the exhaust and notice a small amount of black soot in the exhaust. Is this normal? Then if i dont clean it, after a fair bit of spirited driving i find the exhaust having quite a lot of soot inside it. Is this normal?

(Refer to pictures, one is still dirty, the other i have cleaned)

Thanks,
Mason

Impureclient 11-22-2015 11:26 PM
Unburnt fuel from running rich. Normal.

BRZ'13 11-22-2015 11:27 PM
Seems normal (i hope). All the cars iv owned/scene have jt. Just make sure its not oil. I dont even bother cleaning mine

KR-S 11-22-2015 11:45 PM
It's totaled. :D

MasonL1997 11-23-2015 01:01 AM
Quote:
Originally Posted by Impureclient (Post 2459201)
Unburnt fuel from running rich. Normal.
running rich....will it cause injector problems down the track?

MasonL1997 11-23-2015 01:02 AM
Quote:
Originally Posted by KR-S 86 (Post 2459211)
It's totaled. :D
Damn it! I too fit in with every second post on this forum regarding a totaled car

FRSBRZGT86FAN 11-23-2015 01:10 AM
Quote:
Originally Posted by MasonL1997 (Post 2459246)
running rich....will it cause injector problems down the track?
No, the black "soot" you're talking about is just the carbon buildup due the afr being rich. All cars are set up to run a little rich in stock form - rich is "safe" from the manufacturer perspective. It will not cause injector problems every car has this buildup on the tips it's just some of them you can't see it. Also the FA20 uses Direct injection and port fuel injection. i.e. it has 8 injectors. Port injection still works much better for low rpm and idling for emissions & power. If anything were to be effected by soot it would only be the 4 injectors within the cylinders. At WOT at some points I'm pretty sure it uses both and you'll get that carbon on the tips the more frequently when that happens. Just keep cleaning it every month or so, so that it doesn't get caked on.

MasonL1997 11-23-2015 01:25 AM
Quote:
Originally Posted by FRSBRZGT86FAN (Post 2459251)
No, the black "soot" you're talking about is just the carbon buildup due the afr being rich. All cars are set up to run a little rich in stock form - rich is "safe" from the manufacturer perspective. It will not cause injector problems every car has this buildup on the tips it's just some of them you can't see it. Also the FA20 uses Direct injection and port fuel injection. i.e. it has 8 injectors. Port injection still works much better for low rpm and idling for emissions & power. At WOT at some points I'm pretty sure it uses both and you'll get that carbon on the tips the more frequently when that happens. Just keep cleaning it every month or so, so that it doesn't get caked on.
Awesome! Thank you heaps!

aegisdrgn 11-23-2015 01:31 AM
If you're curious to learn more about the port / direct injection modes...you've come to the right forum!

http://www.ft86club.com/forums/showthread.php?t=50827

http://www.ft86club.com/forums/showthread.php?t=3172

Hotrodheart 11-23-2015 01:34 AM
http://stream1.gifsoup.com/view7/201...pe-trick-o.gif

Braces 11-23-2015 08:26 AM
Is that the same black soot on the floor?

stevesnj 11-23-2015 11:10 AM
http://memecrunch.com/meme/6N4YE/it-....jpg?w=625&c=1

extrashaky 11-23-2015 11:18 AM
You can monitor your AFR with Torque to see if you're running the right mixture. It usually runs about 14.5 to 1.

jawn 11-23-2015 11:54 AM
Quote:
Originally Posted by extrashaky (Post 2459563)
You can monitor your AFR with Torque to see if you're running the right mixture. It usually runs about 14.5 to 1.
Not under load.


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