I have been using opensource to tune my car.
I am adjusting my wastegate on my map due to over boosting and hitting fuel cut. I lower the wastegate to 50 and take it for a spin to see how it does. It runs fine at first and im not overboosting. I slow down and turn around and on the way back at around 60 mph I notice a loud wheezing squeeling air noise coming from the engine. This now happens constantly in 2nd-5th gear.
It doesn't happen when the car is in neutral and I rev the engine.
The performance is not affected just the loud noise.
I recently put on a new stealth back exhaust.
Could this be caused from an exhaust leak?