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Why is there black soot on my rear fender near the exhaust?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Grey Jay, Oct 18, 2010.

  1. Oct 18, 2010 at 8:12 AM
    #1
    Grey Jay

    Grey Jay [OP] Well-Known Member

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    Anyone ever see this before?? It is happening on my 08. I have never had this happen on any vehicle I have owned.
     
  2. Oct 18, 2010 at 8:13 AM
    #2
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Are you burning oil?
     
  3. Oct 18, 2010 at 8:18 AM
    #3
    macgyver

    macgyver Well-Known Member

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    Did you drive through any water recently? I drove through some deep water recently and it splashed big spots of black soot on my back bumper.

    Ever drive a turbo car w/ straight through exhaust and no cat? ...you get lots of black soot :D I had to clean the back bumper of my turbo honda accord about 2-3 times a week..especially when I got pedal happy and kept it in boost.

    My buddy used to have a sonic yellow subaru WRX w/ Blitz Nurspec exhaust and he used to go to car washes that the baseball teams & cheerleaders would do and pay them to try to get the soot off his bumper...they never could lol it was permanently stained on there. It was funny to watch them scrub though.
     
  4. Oct 18, 2010 at 8:20 AM
    #4
    DionysiosA76

    DionysiosA76 Captain Analyzer

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    Its from the DIESEL POWER.
     
  5. Oct 18, 2010 at 8:26 AM
    #5
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Or, it could be that you're running a Nissan...
     
  6. Oct 18, 2010 at 8:46 AM
    #6
    MAXTacoma

    MAXTacoma Well-Known Member

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    This is a common problem w/ the 4.0. Mine does the same thing.
     
  7. Oct 18, 2010 at 8:49 AM
    #7
    ItalynStylion

    ItalynStylion Sounds Gooooood

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    Sounds like you're running rich. Odd that it is on the fender though. The tailpipe isn't even close is it?
     
  8. Oct 18, 2010 at 8:50 AM
    #8
    DeeKay21

    DeeKay21 Lieutenant Dan.

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    I have some as well but I thinks its just common from the exhaust fumes.
     
  9. Oct 18, 2010 at 9:34 AM
    #9
    Fabulous

    Fabulous Well-Known Member

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    Yeah, I have this as well...it's a pain to clean off.
     
  10. Oct 18, 2010 at 10:03 AM
    #10
    05RedTaco

    05RedTaco Nom Nom Nom

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    This is completely normal. Manufacturers tune the engine to run on the rich side at wide open throttle. Ideal air to fuel ratio for a naturally aspirated gasoline engine is 13.1 at wide open throttle. Stock naturally aspirated engines run rich from the factory, because its more safe for the engine. I have seen air to fuel ratio anywhere from 10.5 to 12 at wide open throttle on stock engines. When engine runs rich it will produce black soot in the exhaust and on the tip of the exhaust which sometimes transfers to the body of the vehicle depending on the position of the exhaust tip.
     
  11. Oct 18, 2010 at 10:06 AM
    #11
    06redtacoma

    06redtacoma Well-Known Member

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    cut the pipe off at the last exhaust hanger, problem solved. have not had a problem with mine since i cut it off about 3 years ago. i think its because toyota runs them rich from the factory to make the motor last longer. fuel milage isn't as good this way but the motor likes it.
     
  12. Oct 18, 2010 at 10:09 AM
    #12
    smuggiesrider

    smuggiesrider Well-Known Member

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    I get that too. Pain in the ass!
     
  13. Oct 18, 2010 at 10:11 AM
    #13
    Kyouto42

    Kyouto42 Iron Beard

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    See build thread in signature
    Completely normal, every car I've had has done it to some extent
     
  14. Oct 18, 2010 at 4:28 PM
    #14
    Grey Jay

    Grey Jay [OP] Well-Known Member

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    Thanks,

    Glad to see its not a big deal.
     
  15. Oct 18, 2010 at 4:45 PM
    #15
    Dadic 78

    Dadic 78 Well-Known Member

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    it's because you're from Sudbury! :D hahaha, j/k

    Are you doing any heavy towing? I know when I towed my firebird from Victoria to Kitchener, I had black exhaust soot all over the boxside, etc...
     
  16. Oct 25, 2010 at 2:15 PM
    #16
    psmcn

    psmcn Well-Known Member

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    Has anyone asked a dealer about this issue? It seems to me that in this day and age of ultra efficient vehicles and smog control a rich running engine wouldn't fly with the EPA. The car and truck engines in the US are running so lean there isn't a spec of soot on the pipe and they run hot as hell. I think I'm going to pull a plug to see if it is fouled. If it is then there is a problem.

    Paul
     
  17. Oct 25, 2010 at 2:58 PM
    #17
    Mxpatriot

    Mxpatriot Well-Known Member

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    Used to have that all the time. The solution is to dump the exhaust after it clears the rear axle. Truck will look nicer and stay cleaner. Exhaust tone stays the same.
     
  18. Oct 25, 2010 at 6:54 PM
    #18
    psmcn

    psmcn Well-Known Member

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    The thing about running rich is not the soot on the fender but the fact that it could toast the CAT and lead to excessive carbon build up internally. Both of these issues will lead to power lose. A lot of times it is just a bad vacuum line or some other air leak. I'm still going to pull a plug and see what's up
     
  19. Oct 26, 2010 at 6:16 AM
    #19
    Grey Jay

    Grey Jay [OP] Well-Known Member

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    I agree with the sluggish part. I while ago I started a thread on this website asking why people thought why their Taco was better than my NISMO. Many people wrote in saying that their Toyota's were way faster, well, now I have a Taco and there is no way it is even close to my Frontier…I wonder if this is why?
     
  20. Oct 26, 2010 at 6:24 AM
    #20
    hillbillynwv

    hillbillynwv Well-Known Member

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    Rear Leaf Spring TSB, Front Bilstein 5100's set to 1.75, Goodyear Wrangler DuraTrac 265/75/R16 tires, Black WeatherTech Floor Liners, aFe Pro Dry S air filter, lighted 4x4 switch......
    My clear coat at this same location is becoming screwed up from the exhaust heat. I bought the stock Valor exhaust tip and put it on hoping it would solve the problem, it did not. I try to keep it waxed but it's not helping. I also have an '08.
     
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