I just got my pacesetter lts with ory installed and now i have (of course) no cats. the check engine light (of course) is on and after the first couple days of driving the truck i have noticed that the truck is idling funny. sometimes it is idling at around 500-600 but it goes up and down. Help Please

 

You need to go to Nelson or Wheatley and get a tune.

 

... Ttt

 

No way around it you need a tune!!!

 

you could hunt around on ls1tech and look for some O2 sims, but for a little more you could have a tune. 100RPM difference, is nothing to worry about.