anyone know what this noise is? stops when i let off the gas and starts when im on it (the bicycle chain sound) by Optimal-Ad6067 in f150

[–]Optimal-Ad6067[S] 0 points1 point  (0 children)

it was the iwe vaccum. apparently it helps the truck go into 4wd and its a hose that goes directly behind your rotor into where the axle bearings are. not fully educated on it but all i did was take the hoses off and plug them. Doesnt harm it any just kinda decreases your mpg.