I finally got my MS in fuel only. I started with the PNP base map (97 nonturbo). The entire table was very rich to start. (datalogs going to the 9s). I have since corrected it and things run nicely, but the stock ECU threw a cat efficiency code. I wouldn't be to worried, but even with the stock ECU, the idle is rough and the responce is sluggish. Add to this my exhaust note changed, and I think my cat may be shot.

Is this possible? That runnng on the very rich side for 300 miles will plug the cat? Just thought I'd ask before I yanked it, but this is making me wish I didn't weld it in.
--Alex

 

Start cutting ;p

 

Yea, gues it wouldn't hurt either way. I have an O2 sim here too. Guess its time to wire that in and gut the cat.
--Alex