Should I Get Rid Or Fix?

[tengudemon]

Hi all, now i know if i had the time to trawl through all the posts i could probably find the answers i need but i just need a bit of friendly advice to decide what to do. My celica st202 import is having major problems with power loss especially in the lower gears & my idle spead is around 500rpm, i was advised at last M.O.T that the emissions where through the roof, could the power loss be down to the cat being totally dead? i also had the front lower arm & suspension strut replaced in october last year & now there is a terrible rattle coming from that area when i accelerate/decelarate & the noise is just embarrassing on a bumpy road sounds like i'm gonna lose a wheel.Please any help would be appreciated.Thanks

[GT4 BOOSTER]

rattle could be the cv joint ????

scan for fault codes for emmisions , it may flag something obvious.