I have a standard 51 plate WRX and have just fitted a Walbro pump and pink injectors now its spluttering at above 3000rpm?

Does this mean the car is overfuelling or do I have a problem?

It starts and drives fine but starts to cough just as the turbo kicks in.
The car is getting mapped mid January, so, if it is overfuelliing, will it be ok to run it off boost till it gets mapped?


OR

if this isnt normal, is it likely to be drawing air?

 

https://www.scoobynet.com/general-te...injectors.html


Just found this. Its all making sense now.....................