Ok, I noticed today when I accelerate hard like getting on the interstate; my 05 saab 95 check engine light flashes and puts up a pending p1300 but it never sets active because I am not always driving my car at 5k rpm. Wis directs me to replace spark plugs. Spark plugs are less then 1 year old. I have a new DIC which is a PPS part thats 3 months old. I have yet to check fuel pressure but I also am 100% sure my cat is bad. Rear o2 sesor is new and always reads the same number as the front sensor. I also have a p0420 that is active. Vehicle drives perfectly normal other then at 5k. Gonna run a semi permanent fuel pressure gauge to see what the fuel pressure is doing during the fault. Also did the catalyst test with the tech 2 which also reads low o2. Any other thoughts will be entertained... but I am pretty sure that is down to a restricted cat of fuel pump.