6.0powerstroke
New member
I have an 04 F-250 6.0 with nothing done to it other than a straight pipe exhaust. The truck started making a whining noise a couple months ago and I can't figure out what it is. This is what it does. Driving down the road it will make a whining noise that start to be heard real good at about 25mph and the noise gets pretty loud at about 70mph. You can always hear it but 40mph to about 55mph the noise is kinda covered up by the sound of the engine and exhaust, But as soon as I let off the throttle the noise goes away but when I give throttle again the noise comes back. It does not make a whining noise when I rev it up or when I do a boosted start. Please give me some ideas on what it could be.