I definitely need some help. got in my truck the other day turned it on and immediately realized it wasn't working right. went and got it scanned and it's saying misfire on cylinder 1,2, and 4. and running lean on both banks. I thought it was probably a bad coil until I looked it up and those cylinders don't all run off the same coil. pulled the plug on 1 and 3, 1 was pretty black and 3 was pretty white. I'm trying to decide if it's worth buying new plugs and a coil or if maybe its a bigger problem. Anyone have any ideas?

 

Year and engine, please? What brand are the spark plugs and how many miles on them? How many miles on the truck?

Post the exact P-number codes, please.