installed a lq4 with 223 232 115 custom grind cam in my 06 Silverado has mp112 3.2 pulley runnin 5 to 6 lbs boost also had headers had exact same setup on my 4.8 but no cam everything runs great except a idle surge will sometimes get as bad as 300 to 1200 rpm supposed to be 750 ive searched a lot and tried a lot I'm not too experienced with tuning I did my 4l80e segmentswap and tuning myself and few other things I actually had a pro dyno tune this thing does great wot afr is 11.3 just the surging I had him try to fix it but no luck