Question about Mercedes-Benz Sprinter
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Posted on Jan 02, 2017
Black smoke, real black, is unburnt fuel in the exhaust. If it clears up in a very short time, it may be only due to the extended cranking you have to go through to get it started. If fuel consumption is not awful, it is possible that the hard starting is not a fuel problem. If this is fuel injection, too much gas could be leaking injectors, but as above, if it clears up right away, the smoke was from extended cranking forcing all that gas into the cylinders. You probably should check fuel pressure, always do that for hard starting.
Check your ignition system, use a calibrated spark tester. Need new spark plugs and/or plug wires?
Posted on Nov 09, 2015
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