Chugging sound

[dextroyer]

I have a 2000 v8 awd explorer that sat for 6 months. It has this chugging sound only under throttle. I changed the oil and took it on the highway and now it had a shudder intermittently under acceleration.
I'm going to get new plugs and wires, and a fuel filter and see if that is going to solve it.
Anyone experience this chugging noise? again its only under acceleration

 

[1997XLTRollover]

It's not an exhaust leak is it?

 

[dextroyer]

It would have to be a pinhole leak from the manifold. Now I'll just have to see if the plugs and wires I just picked up fix the shudder.

 

[Flash]

Do the V8 lifters have a tendency to leak down over a period over disuse?

I know that the locally made Ford 6s that use the same or maybe similar lifters willer do that.

 

[dextroyer]

I traced it down to the gasket material on the headers, it is deteriorating and a small leak is there.