I cant get it to rev smoothly up the rev. when i try rev it up from tick over at 1500 rpm it just seems to stivk at 3000 rpm as i am still try to rev it up and it just jump, its like a delayed reaction. is that how all 954 rev ???.Do you mean bouncing up and down on tick over ???? if so not a mager mine has done it since day one, if you mean jumping up from tick over to 5000 revs, then there is a prob.