Originally Posted by 03 f350
Ok thanks a lot! Another question entirely different. Highway speeds at 80kms I get a medium shake but only when I apply the gas to maintain speed and when I give it a lot more it goes away somewhat. Is this bad injectors or FICM? I just had 3 replaced and new FICM from previous owner. If I coast it goes away. I'm hoping it's just bad ballpoint cause I do need to replace them but I have a feeling it's more.
What you are describing sounds drivetrain or chasis related, more so than engine related. Check u-joints, carrier bearing, ball joints, track arm bushings, tires, etc.