My vectra c 2.2 sri has a very slightly annoying thing that happens.When I let off the throttle in traffic going at any speed then go back on the throttle very slightly it seems to hold back as if the revs have dropped of for a split second which you feel when driving it then goes away normaly.If I put the throttle hard down after letting it off it pulls away fine without the slight hesitation at all.Also the tickover when stood will all of a sudden drop off as if its stalling but then suddenly picks up back to its normal 700rpm. This does not happen all the time but it seems as if its not getting the right amount of fuel for a split second.Ive changed the fuel filter and got new plugs in as well.The management lights not showing at all either which I thought would if something is playing up slightly and making the ecu read a fault.Its nothing major just very annoying when I know its doing it.Any help is appreciated on this one.