Hello Everyone,

I'm new to this site and was wondering if anyone could help me or if anyone has previously had the same issue as me please.

I currently own a mazda 5 2.0 diesel 2007, when trying to start the car it takes a while maybe 10-15 seconds and that's if it starts once running the car ticks over fine then after maybe a minute or two it gets really lumpy and stalls and some times if I tap the throttle it will stall, When driving the car in 1st and 2nd the car is fine doesn't miss a beat but soon as I go in to 3rd the car starts to judder and in 4th its worse and so on through the gears, If going up hill it will do the same all the way up to the top of the hill if I stop at some traffic lights the car will stall and odd's are it wont start again until it has been left for a while if I'm lucky, The car is also giving no error codes when plugged in to an OBD meter and the engine management light is off I've had the fuel filter changed and still the same problem please help