Car just had mot. i ran it low on diesel but not to empty. Yoday car not responding well to aceleration and it feels like my old car used to when i had a split in the carburettor cap. Injector gault light comes on then car drives and acelerates out of it. could it be dirt where i have run it too low on diesel. Would this have been caused in any way whilst mot being done. car had oil change and winter fluids added. thank you.