VRS - Acceleration is odd

[Fastblack]

Hi car is 2005 vRS and under hard acceleration it seems to "lurch" forward in a pulsating manner - sort off feels like handbrake is being applied slightly and rhythmically whilst accelerating or fuel not being delivered smoothly.  Pulsing is every half second or so - really weird sensation.  All other aspects seem fine.  Any ideas?

[Jux]

Search for boost surge, spend hours of your life reading all the causes. Typically boils down too boost leaks, dodgey charge pressure control valves (N75) or leaks on vacuum lines.

[sharkrider]

if there is an aftermarket DV replace with standard or use a service kit (forge)