black smoke when accelerating

[cooa99]

Hi all,

I noticed that I get some black smoke from the exhaust when doing a fast acceleration (i.e. burying accelerator to the floor) when:-

1) Joining motorway at 50mph then fast accelerating
2) at say 20mph then fast accelerating

Problem disapears under normal driving speed, acceleration conditions

Any idea what it is?.

Additionally, Is whatever the problem is, covered under warrantee ?


Cheers

cooa99