I've been running a code 9 for a while now. Is there a way to replace the CYP (no. 1 cylinder position) sensor? I had the same problem on my other rex and just swapped out the whole dist. I read a post on this forum about rebuilding distributors. How is that done and what is needed? If I don't rebuild it, any dist from 88-91 SI/HF will work right? I looked them up and the part #s are different between 88-89 and 90-91 distributors.