Newbie question

Discussion in 'GM Powertrain' started by carbon black, May 22, 2012.

  1. carbon black

    carbon black Member

    I have now almost 2,000 kms on my new truck (1,300 kms - solo; 700 kms - towing) and lately, I've noticed that the inside of my tailpipes are BLACK - It's almost like a black powder coating the inside of the tailpipes. I've never seen this before - so I'm wondering if anybody else has experienced this and if so WHAT'S CAUSING IT
  2. 08_rado_rocker

    08_rado_rocker Member 2 Years 500 Posts

    You've never seen black on the inside of exhaust before? This confuses me. Especially considering your exhaust is no longer stock, this should be expected. Even more-so when under load/lead foot driving.
  3. KyleZ71

    KyleZ71 Epic Member 5+ Years 500 Posts ROTM Winner

    Your engine is running a little rich. No real problem but not getting best efficiency.

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