Hi!
Sounds like a MAF, or boost issue, with the boost not being able to hold the constant high volume boost or over boosting then cutting back then boosting again, could also be weak, DV, spilt pipe, weak actuatoretc. Your best bet it to start with the MAF and DV.
We only have 4 coilpacks in the UK at the moment, they are due to be tested thursday on one of my fitters own AUM. If all tests go well they will be put in to production so we will be getting them for the Summer. This is the comapny who we are working with on the coil packs.
http://www.xspec.co.uk/Subaru%20index.htmIf you ever want to pop down to me I will take a look at your map and check for faults with the car if needed. We are always willing to help.
Congratulations to Marco Rossi
I am sure you will be even more happy on the 15th. I am looking forward to it video cam on the ready.
All we ask for is honest non bias feedback on our product and service.
Nick