Black smoke indicates a rich fuel mixture (over fueling). This can be caused by many different problems.
What's your question? Having problems with cruise?
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Black smoke is an indication of an overly rich fuel/air mixture.
My 1997 e350 has 6x8
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Black smoke is usually from excess fuel. Blue smoke is usually from excess oil.
its an expansion valve and it is located in the black box ( in the rear unit)
e350 is bad that's why
The E350 is an Ecnoline van, The f350 is a Truck
Ford e350oil capavity