06 Audi A3 2.0t fsi CEL p0455

[Djparrish92]

I have a 06 Audi A3 the cel is on and it reads code P0455 Evap system leak detected (no flow )
I've replaced the gas cap and still no fix it's also jumping when accelerating kinda like a missfire
But the CEL isn't flashing like it did one time before. Does anyone have any idea what could be the
Problem I would really appreciate all the help I can get

[Djparrish92]

Come on guys I need your help I have 68 views and no replies

[Djparrish92]

I changed the n80 purge valve and it's still jumping and skipping like it's misfiring

[yonip79]

check your vacuum hose by the brake booster if there is crack on it.