I have a Check Engine light on so I went to Autozone and they check the code. Came up with Bank 1 Lean. The guy said it would be a dirty injector. So I tried the SeaFoam. After running one tank full of gas I pulled the EFI fuse to reset the light. Now my truck will barly get out of it's own way. Low RPM are really bad. Seems light it's not firing on all 6 cylinders. What could it be? I changed the plugs about 3 months ago. And also did a new cat-back. Before pulling the EFI fuse I only see a idle problem when it was cold.