52 1.8t AUM, hesitation, weird stutter after starting

[Manford]

So I fixed the second air pump at the weekend and now when the car starts after couple of secs it kinda judders and then is fine

I’m also finding a hesitation/miss between 1500-2000 rpm. When under load at low rpm I get like a chirpy noise, I’m assuming I’ve got a leak somewhere?

I have no engine lights, no error codes via vcds.

[Manford]

Update - Cleaned throttle body and maf.....seems much better now.

Still get weird noise / chirp when under load at low rpm.......

[Wazzzer]

Would say it's an air leak somewhere mate, check all the pipes from the carbon canister right through to the ones going to the actuator

[Manford]

I can hear the carbon canister clicking away...I thought it was going to be a leak somewhere was hoping for a quick way to find it, but do you think it's more likely on the bigger plastic stuff than the little vac lines?

[Wazzzer]

Unfortunately it could be anywhere, some splits won't show up until you move the pipes about