Hi, I bought a ba xr6 Turbo over the weekend with 190, XXX km It had a miss when it would come on boost so I replaced the coil pack and spark plugs with genuine ford items, while I was doing this I also cleaned the TB, cleaned the PCV and as per a guide on here sprayed some WD-40 down the wastegate line. After this I took it for a test drive and the miss was gone but it was making a howling noise from 3k+ and would go away further up. The noise sounded like it was coming from the exhaust After a couple of minutes of driving I heard a 'pop' noise from under the bonnet and heard the sound of compressed air rushing out, when accelerating I could also hear a 'zzzzz' whizing noise so I thought an intake pipe had probably popped off so I babied it the 2 minute drive back to the workshop. Checked all intake pipe's and vacumm lines and everything seems fine, when driving the car it seems very underpowered and feels like its not making any boost, however it starts and idles fine. It it possible that the wastegate actuator is stuck open? or is it more likely the turbo has been damaged? Im going to check again for boost leaks tomorrow What else should I be checking for CLIFFS: Replaced coil pack, Sprayed WD-40 down wastegate hose, clean TB and PCV Now car is acting like it has no boost, underpowered and making 'Whizzing' zzzzz noise (Can hear turbo spinning?)