HEY anyone have a clue on this one?. Bought an 03 Is300 and had a check engine light on for random miss on 4,5,6 and a bank 1 lean.. bought both new o2 sensors for bank 1 sensors 1 and 2. new NGK iridum oem plugs new wires swap coils from the cyl 6 and cyl 2. cleaned the throttle body. I erased the codes drove around my town 5-10min later the check engine light turns on but only steady. doesnt flash but the Trac light does. I erased it just before i got on the thruway to a car show and drove an hr all the way racing it a little bit here and there.. when i left driving normaly at slow speeds the CEL turned on again for same codes wtf?
Vaccum reads 20-21hg and i put a lil bit of coating aroudn the orgin for the MAF and sprayed the intake manifold and vaccum lines for leaks Nothing ...

 

got actual codes?

actual fuel trims?

 

I dont know if it will help but have u tried pullin out ur spark plugs and checking or cleaning them off, and cleaning the whole of any depree/condensation? maybe one of ur hoses leaked a lil coolent in there. i had an issue like that and thats what it came up to be. problem was fixed before i did everything u have done. or maybe the seal for ur gas cap is bad and it pops the codes. jus ideas for u