Hope someone can help.I changed a fuel filter (ryco z200)on my wifes r34gtt and the car splutters now and shakes on idle,i cheked everything i can see in the engine bay like hoses and clips and its all good.I just done a self dignoses and i got code 55 which is all good.What could it be if someone can help asap ,because she needs the car to take kids to school tomorrow.I can put on a video if needed.thanks