Bank 1 to lean

So i pulled the code off my Edge tuner.

What can cause bank 1 to run lean?I need all possible answers so that i can narrow it down.

Just changed my oil yesterday to the new Castrol syntiec with titanium.Before that i was using Castrol syntec fully synthetic.Thanks all..

 

Dirty maf? Maybe vacuum leak? What kind of air filter

 

Fram air filter.Supertech oil filter.Oh i also added a gum out fuel system cleaner if that makes a difference?But i have added that stuff before and has always been fine.

I will have to check MAF.What and where vacumes leak?

 

Vacuum leak is a small chance but maf is likely

 

probably maf, try that first

 

So no one else has any other idea's on what else it could be?

 

Haha I wish but im having the same problem.

 

I had this problem for a while too and once I cleaned the MAF and TPS as well as the intake and intake manifold.......I still had the problem lol.

Once I got custom tunes for my truck it balanced out and I havent had the problem since. You have an intake and exhaust on your truck right? I heard the canned tunes that our tuners come with are based of off stock trucks and not ones with bolt on modifications like most of us do. That might be it. It was for me and only bank 1 was lean just like yours.

 

Ya i got cat-back duels,and the gots mod

Thing is i never had a problem before.Yet i had cutback duels and the gots mod.I am going custom tuning thats for sure.

 

its those bumper lights causing your problem so remove them and it will clear up