3k-3.5K Flat spot help!

[Sim454]

Since having stage 1 installed on my AUM, I get a flat spot where the turbo dies at 3k-3.5k revs in every gear.  I have new MAF fitted. Now before you say it's the mapping at fault, could it be:

Wastegate fault?
N249 opening up my 007s?
N75 fault?

Any info massively appreciated.

[LR5V]

I would invest in a vagcom cable and scan for faults, but if your re-mapper was any good they should have done this before getting stuck in.

1.8t are not the smoothest engines, but from what you are saying yours seems to have an issue, likely suspects are engine breather system and vacuum pipework.
Breather system pipework dissolves itself from the inside out -mine felt off for weeks before the check engine light came on only to find several holes.
Also the vacuum pipework just turns to dust.
Best to just replace with silicone-
Breathers, I used a creation motorsport kit, but they do require some cutting to fit.
Cant remember the seller, might be mr.silicone, but I got a great engine kit of silicone pipes and just replaced all the old rubber pipes

[Dalo Harkin]

You'll always get that because unless you have upgraded to a bigger smic or fmic you'll notice lag much more especially after a remap

[Sim454]

Thanks for your replies.

All pipework is fine, everything has been replaced now.  It ain't lag, that's at the beginning of WOT not mid range.  I'm thinking now it's probs either N249 or sh*t mapping.

Cheers guys

[andy68]

Do a temporary by-pass of N249 and see if it helps.

[Dalo Harkin]

Thanks for your replies.

All pipework is fine, everything has been replaced now.  It ain't lag, that's at the beginning of WOT not mid range.  I'm thinking now it's probs either N249 or sh*t mapping.

Cheers guys

Do you have a boost gauge fitted? what is it getting up to just before it loses power