at least i get good parking
clean mass air for lean codes and also check for vac leaks and if you can check whats your stft at stft is whats happening now and ltft is whats been happeningSo i am having the exact same freakin problem. except i have LT and no cats is one of my only mods, but i have alot of black smoke and crappy driving.
I just swtch out my plugs, didnt help a bit, so i guess wires are next.
Oh and my codes are ( random misfire, and bank 1 and 2 are lean)