Just rattlin yer cage dude.
One other possibility is that your timing could be slightly off. IIRC our engines have some sort of auto adjusting timing but if the timing belt is off by 1 tooth, then it could exhibit the symptoms you describe.
I just noticed in the Amigo this morning that I had a pronounced hesitation right around 2400 RPM. I'm also getting a whine that sounds like it could be the TB tensioner. I hope it was just a quirk & that it's running smooth on drive home tonight. BTW the Amigo has the 3.2L engine so very similar to the VX 3.5L.