slamarre Posted April 25, 2008 Report Share Posted April 25, 2008 Hi, I was washing my 3805 tonight and i noticed that inside the exhaust tail pipe an accumulation of a tiny layer of black powder/dirt. It was not a lot since it was not visible when looking at the interior of the exhaust tail pipe from a 4-6 feet away. However, when i put my finger in it, my finger got dirty with a black powder/dirt. My fincger was not all black but it had some trace of black dirt. What this could be? Engine not completely burning the gas or could it be burned oil? Is there other member that noticed that anomaly? Could it be caused by the fact that my car has only 400 miles on it and this will go away when putting more miles on it? Member who are mechanic or have a lot of experience in engine, please speak up. Thanks. Link to comment Share on other sites More sharing options...
07SHELBY GT Posted April 25, 2008 Report Share Posted April 25, 2008 Sounds like normal to slightly rich.The factory FRPP tune is conservative in that it is a bit on the rich side.Probably what you are getting.Other possibility is what you mentioned on the rings passing a bit of oil until break in but unlikely as the car would have needed oil by now.or does it? Link to comment Share on other sites More sharing options...
RogerS Posted April 25, 2008 Report Share Posted April 25, 2008 It is carbon build up. Most likely your tune, as other's, is running rich. Too much fuel. Nothing a good tune and a Steeda cold air elbow won't take care of. Opps............there I go, spending your money. I guess Mywickedshelby was right afterall. Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 25, 2008 Report Share Posted April 25, 2008 ....you just cant help it....can you? (we are lucky to have you) Link to comment Share on other sites More sharing options...
ingram4868 Posted April 25, 2008 Report Share Posted April 25, 2008 This is common with the GT500 also. Ford tuners play it safe with tunes a little on the rich side rather than risk a lean condition. Link to comment Share on other sites More sharing options...
mywickedshelby Posted April 25, 2008 Report Share Posted April 25, 2008 easily fixed! Link to comment Share on other sites More sharing options...
SGT2666 Posted April 25, 2008 Report Share Posted April 25, 2008 Most of the blown cars will be on the rich side for safety and you'll see some carbon. Link to comment Share on other sites More sharing options...
ShowCar Posted April 25, 2008 Report Share Posted April 25, 2008 It is in fact carbon build up. If your like me you polish the inside of the tail pipe with metal polish.It minimizes the build up. Yes Im that serious. LOL Link to comment Share on other sites More sharing options...
JeffIsHereToo Posted April 26, 2008 Report Share Posted April 26, 2008 It is in fact carbon build up. If your like me you polish the inside of the tail pipe with metal polish.It minimizes the build up. Yes Im that serious. LOL He REALLY is! Link to comment Share on other sites More sharing options...
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