its not too much of a problem, but when driving to sva, i noticed one hell of a grinding noise when i get going...could be the diff but im not sure... has anyone experienced anything like this??

also when accelerating hard, she seems to splutter and almost die, shes okay at low revs, but i cant really put my foot down. im thinking this could be cause shes running too lean? on a 2000 engine, the screws are about 2 7/8 turns out... with increased jets and new filters...

is there oil in the diff?

If you haven't got a cush joint in the driveline then you will get some crunchy noises coming out of the diff when you get going (especially as your ear is only a few inches away from it). But equally it could be a sign of low diff oil levels etc......

its a sierra lsd, with about a litre of oil in, it is very low compression oil... theres a bearing in the middle with cv joints, but these all seem okay...

May not make any difference to those who know but you dont say what engine youve got

ooh, sorry, its a 2000 r1 engine...its european so its got carbs and an air induction system...