thanks leroy and scotty, the problem i have is when you start up the revs are surging up and down, when i select driive it evens out and ticks over ok, accelarate to go and nothing, revs take a nosedive, there is a rattling when cold but goes when she warms up, my garage says it could be a streched chain throwing timing off hence the ask about a chain kit, or the cam sensor is goosed, the problem didnt just happen, ive noticed her having a miss while driving around the 60 mark like it misses for a second but has gradually got worse, cant drive her at all now, cheers for any info lads.