I don't know if this is a common problem with this truck or not. I can't start my truck with the front gas tank , nor does it do well on hills. But once started on the rear tank I can flip it to front and it runs a little sluggishly. Sometimes it actually seems to be doing good, But I can never start it on the front tank and its very sluggish on hills, On rear tank it runs great. Also and I'm thinking its connected. The check engine light comes on after a few minutes of the engine starting and stays on till I shut it down. When I restart it the check engine light is not on, but after a minute of warming up , its back on again. Any ideas out there as to why and how to fix it?