My W reg 1.8 has an annoying Intermittent Power Loss problem, when driving along it all of a sudden feels as though Im towing a heavy weight and no matter how much I try to excellerate the car just wont respond, then all of a sudden it will clear and excellerate away as if its got a rocket up its arse. I can sit at 70mph on the motorway and everything seems fine the problem seems worse at low revs. I have had new plugs, leads, dizzy cap but the problem is still there. I have had it hooked up to a computer and there are no fault codes. Can anyone help?