1.9D Revving Uncontrollably - Blue Smoke

[dan_j1]

Hi.

Iv recently bought a 2006 non turbo 1.9d berlingo. The van drives spot on for most of the time but every 50 or miles or so the engine will rev its tits off and blue smoke pours out the back. Then when I turn the key off quickly to cut it out it still revs on its own for another 5 seconds(ish). I have also noticed the yellow engine management light pops up for a few seconds every now and again.

This is obviously very dangerous and I need it fixed asap! My mechanic cant figure out why its doing this, all we know is it must be feeding on its own oil.

If anyone can help they will be a hero!

Thanks,

Dan.