GEN 2 Strange noise on cruise

[fitzyro]

Anybody have any idea what is causing this noise when I let off the accelerator and free wheel??

https://www.youtube.com/watch?v=4bTxWKngB_U

 

[kpg81]

Sounds like you have a modified exhaust and a modified blow off valve that's venting to the atmosphere.

Let me guess, you bought this truck used from someone recently?

 

[MGD]

^^^ bingo.

 

[fitzyro]

LOL, sorry the noise is the first 3 seconds, you can hear a ticking noise before I step on the gas.