My VG SE runs great most of the time, like, when I 've driving normally, it runs perfect. But, if I give the gas a sharp prod, say to pass or something, the car definitly sudders/stumbles, whatever. Its quite quick, like only a second, and once past that, it goes back to being its good old VG self.

Any ideas as to what the likely causes of this would be? It has a fresh tuneup (new NGK wires and plugs, cap+rotor) and normally runs quite nicely.

 

Vacuum leak

 

This is what I got at my usual web hangout. Lots of car people here.

Any of that stuff seem likely?

 

None of the suggestions on the other board seem likely. If this issue occured before the tune up, it's likely not ignition related unless you have improper spark plug gap in your new plugs. It's more likely vacuum hose related, intake manifold, air reg valve, etc...