Hello i hardly post in this forum because I've never really needed to, but the time has come where i believe i have to. I own a Honda Accord I-CDTI 2005, i have an intermittent problem. The car stops accelerating from 4th and 5th gear, even when the foot is down it feels like its losing speed. Also sometimes it struggles to accelerate from stand still, pretty dangerous living in Milton Keynes with the roundabouts. Sometimes it blips from 800-900rpm when this is happening. It is intermittent as it drives fine sometimes. I must say that when i put my foot down sometimes i get a quick drop in acceleration like its starved of fuel or air for a second then goes back to normal. What i have had done already is: Fuel filter New TPS sensor Throttle body cleaned thoroughly Intake manifold cleaned even though it was not that dirty. I think thats all that has been done. Can anybody else think on anything it could be from past experience? Thank you in advance.