a bit confusing your reply but (typing mainly).rb's run similar set up as CA18det' engines as far as cas go ( i read up a story on them in one of the import mags and sounds similar to your prob) when it come to cas,now if the cas is faulty it will scatter timing when the spline gets flogged out causing confusion for the computer. to what i believe to which it sounds like thats what is happening,can you go a wrecker and get on and try it at least? is it worse when you run more boost??