So today went for a short drive and noticed the nav seemed a bit sluggy. Then much more noticably sluggy . To the point that going up a slight incline at 100 kph wouldn't happen any more. Heaps of black smoke and power just kept on dropping off to the point i thought i wouldn't make the short drive home. Starts up without hesitation and Idle is fine no wierd noises just shit loads of smoke and no power. Smoke smells almost kerosene like.???? Any ideas ??