hi my 1.8 nissan almera sport on tick over it go 1000 to 2000 it dont tick rite and and stuters when driving like if i slow down or speed up its been like this for over 12 month and its a pane it only has 66000 on the clock when i got the car it had 58000 and was the same its my falt for not asking for a test drive can some one please help thanks from phil