Charles I removed air filter hose and went for a drive I could not notice any difference in the amount of smoke. Checked breather cap and hose all seems ok. I did mention in my 1st post about the exhaust manifold and inlet manifold being oily would this mean ring &bores worn or would this be a blue smoke ???
It would be blue smoke if it was a
little engine oil coming past the pistons or down valve stems, but you were talking about lots of BLACK smoke when you give it the welly. Right? That does suggest excess fuel.
One other possibility is that lots of engine oil is being blown out of the breather pipe and into the inlet manifold when you put your foot down, and making black smoke. Crankcase pressurisation can cause this, like worn rings and so on, but you would notice it using a lot of engine oil.
Take the breather pipe off the manifold, and tape it on to a plastic milk bottle so it "breathes" into the bottle. The bottle will need a hole near the top to let fumes out.
Get the engine warmed up and take it for a run and use full welly as much as possible. A few minutes of this and you'll know if it's blowing heaps of oil into the bottle.
It's a question of easy simple tests to enable you to diagnose the problem, basically by eliminating possibilities one by one.
My top favourite is still over fuelling. The DPA injection pump is fitted with an EXCESS FUEL DELIVERY SYSTEM as a starting aid. This should set itself whenever the engine stops (hot or cold) and UNset itself when the engine fires up. Let's hope this isn't stuck ...
Have you tried a bottle of diesel cleaner stuff? Some folk swear by it.
CharlesY