under a hard acceleration my truck makes some sort of clicking noise and it keeps on doing it til let off the gas. sounds like it is coming from underneath the truck cause it did it again today with my windows down. anyone have any ideas to what might cause this to occur?

 

might i also add the truck seemed not to go over 80mph the other day when i was headin down to the beach

 

That sounds like the check valves for the IWE system. Their job is to maintain vacuum to the hubs under hard acceleration.

 

alright thanks ill give that a look