I was driving down the road. Then all of a sudden, around 45 mph, my truck started putting like it wanted to die. I knew I had to change plugs and oil, so I did that hoping it would be the plugs. But, it wasn't. Some people have told me that it could have been bad gas or plugged fuel injectors??? I am not sure. Can you help me out and give me ideas as to what might be the problem? Thanks a million.