Went out for a run today,nothing major just country roads but again i noticed a problem, When your doing 55-60 in 5th gear and lightly touch the throttle i felt the car judder backwards and forwards,it clears and alls well, No smoke or anything like that out the exhaust, Had the car 3 weeks come tuesday and it did the same last week when i went on a 300 mile round trip, Not every time it does it..once whilst your out but still it shouldnt do it MPG's good 50.9 so dont rearly know and no lights on the dash, Anybody had this before,cars--- 1.8tdci zetec mk2.5 08 plate only done 20,