bed wrap sound?

Hello friends. In the case of bed wrap, the sound in the form of plug-and-play comes in all the time, or does it come when it is loaded into the gas or under another special condition. ?

Let me answer as much as I can get past, the bed wrap starts as soon as the vehicle starts

Make it the same sound that I had a problem with the beefers

Someone of the cock on the valve may be cracked, the cylinder head may be cracked, the engine works like a noisy tractor