If a diesel has heat, fuel(air) and compression, it will start. Assuming this is a car you have been driving regularly. Black smoke is normal and ok at starting and some till warmed up. The better the engine and the better a engine runs, there will be less, but every time the engine turns over and does not start fuel gets sucked in and then when it does start, black smoke till its burned up. Maybe you got some air in the system somehow.Max P.S. I found out old diesel fuel loses cetane and makes for hard starting and loss of power
--- In diesel_mercedes@yahoogroups.com, Lawrence Rhodes <primobassoon@...> wrote:
>
> If glow plugs, fuel, valve adjustment & diesel purge are all done and the car
> has good power climbing hills what is left that cause it not to start well.
> It's worse in the cold and that's just below 50°F. What could it do to cause a
> black puff on starting. Well that is unburned fuel but why she no fire up. Can
> a working set of glows have another reason why they aren't heating up enough and
> how do you check? Hard starting no matter if I use diesel, biod or veg oil. I
> had an older lower compression didn't run as well 240 and it always started
> right up with half throttle. Lawrence Rhodes....
>
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