Can anyone help, ive got astra mk4 1.6 8v 1998,sometimes she runs fine then all of a sudden she starts spluttering as if theres no fuel getting to the carb then after a couple of seconds she picks up again and shes fine,ive already changed plugs,leads and petrol filter,cleaned the carb and egr valve.Ive ran some redex through to see if that solved it but to no avail i dont want to spend on a diagnostic because the eml light has never come on.In neutral it never splutters it goes through the revs really smooth every time,it only seems to do it when driving.

Any help or suggestions would be greatfully recieved.

cheers charlie.