Right then folks, I know its Sunday but its brain picking time lol. I have got a new toy (a V) and its cat back exhaust, stock cat, air filter, stock actuator, stuck ECU, stock everything. On Lo boost its behaving I am getting 6Psi, however on high I am getting 13Psi. Its not fuel cutting, but there is NO FCD (I have looked, ECU has no tabs so can only assume its a stock unit. Booted it on the M4 yesterday and ECU light came on (guessing it picked up knock) as I pulled in turned car off and on and light went away. I have changed back to stock air box today and made no difference (thought maybe air filter was causing creep). Now I am down to this list: Actuator sticking (but I am getting Lo boost fine). Dodgy factory boost solenoid (again Lo is working fine). Cracked wastegate. Anyone come across this before I start pulling the car apart?