black soot

1997 MERCURY MARQUIS
118,525 MILES • V8 • 2WD • AUTOMATIC
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DANO2448
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have a 1997 grand marquis.what does it mean when you have what looks to be black soot around fill neck hole for fuel tank?
Nov 14, 2010 at 12:21 PM
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WRENCHTECH
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It probably means someone tried to put something into your fuel tank. There is not reason for anything to be there.
Nov 14, 2010 at 1:08 PM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
Now, if your referring to the outside of the car and it really is soot, it could be coming out of the exhaust and getting on there due to an over rich fuel mixture.
Nov 14, 2010 at 1:10 PM