I can't believe the amount of
"Put on a bigger turbo posts"
The bloke just said he's got an autometer afr reading and it's reading lean.
Should he take that advice, boom goes the engine...
I didn't expect this from you Ash.
Anyway, if you find you're leaning out after 5 grand, look at your fuel map first. If that looks right, then look at your fuel pump, it may be faulty.
Then and only after then should you take the advice that's been given here.