was skipping alot at idle..changes all plugs and at idle it still idles rough..but going down the rd it runs fine..autozone codes say bank 1 and 2 lean and bank 1 misfiring..i changed coil on #1 cylinder and it still didnt help..i can even unplug the coil on #1 cylinder and it makes no diff..i cleaned out 1 and 2 injectors put back in and still no difference..so i changed #1 and 2 injectors and put in..crank truck and unplug #1 injector and coil..truck makes no difference at idle..i dont see any vaccum leaks..i am stumped..any help would be great..if u could call me at 336-479-2333 would be appreciated..ty

 

I would start with the IAC. Also. check the elbow at the back of the throttle body. It deteriorates and leaks. Then, I would clean the MAF and the throttle body.