mine is carburated and it is fine w/o the cat ,I'm not sure about efi.It can be done but you might have to make some modifications.I think tps is throttle position sensor,but you better check with one of the efi guys to be sure.search the cat topic on here Im sure there has been a thread on it.

oh what a feeling:
#1 86 xtra cab 22R,EB 261 cam ,Hooker header,2" ex with cherry bomb, Aussie powered
#2 86 sr5 4x4 efi parts truck
#3 87 2wd parts truck
84 supra yard art