Hi all, my '04 FR 1.8 20VT has started misfiring/running rough when you dump the accelerator, particularly when overtaking (initially the engine management light was flashing when this happened, but is now illuminated all the time). It runs smoothly the rest of the time; it feels like maybe it's overfuelling under acceleration? It's not down on power - if I ease the accelerator down, it still pulls smoothly. Any clues? It's totally standard and has done 110 k miles, but has been regularly serviced. I changed the fuel filter the other day, which hasn't really helped any.