e39 wont rev

fitted my camshaft sensor today as had the error code showing it was failing and a while back it just lost power,anyway fitted it and no difference,the car wont rev past 1000rpm,tickover is fine,after a few mins the orange triangle appears and eml light.tried another maf and same,unplugged maf and same..anyone any ideas.really annoying as it wont move at all.was fine but parked it up for about 8 weeks and then started having this issue.