Ford trucks trouble shooting intake is bugling?

Ford trucks trouble shooting intake is bugling?

Not trying to be disrespectful but what is "bugling"?

If it has the single overhead cam 4.6 V-8, like a 2002 or so, there was a batch of bad intake manifolds. If you look at the very first runner on the manifold - IF it is plastic, it could be a bad one. IF the very first runner is cast aluminum, it's not the problem intake.