Engine makes funny noise when I accelerate

[TravisAe86]

Well I just got my car back from the shop because it was making a funny noise when I start it up and drive it. Turns out there was a hole around my flex pipe. While the flex pipe got fixed but guess what? Its STILL making noise....but these noises are totally different.

When i press the gas a buzzing sound emits from the engine and the more I press the pedal the louder that sound gets. But wait there's more ! If i floor the pedal the buzzing sound gets louder but then this brrrrroooooom sound joins in....idk what to do. IDK if its the gasket, manifold....idk. My exhaust pipe has been welded 3 times because of it bursting and random cracks....idk where the noise and exhaust problem is steaming from...idk if is from my engine rocking/jump when I change gears that's making the pipes move/flex and then break.....

[Retrospekt]

Let the car sit until it has completely cooled. Start the engine, pop the hood. Stick your hands near the places where the different pieces of the exhaust bolt together. A common leak area is in between the manifold and the front pipe. It's a small circular gasket that deteriorates over time and leaks, and makes that weird noise that you are describing.

When I bought my car it was making this noise, but I didn't notice it. I thought the car is just loud because it's a 4 cylinder. I was wrong. Replaced the gasket and it's 5x quieter.

[chronoti]

i use seafoam to vapor check for leaks seafoam it and look to see where smoke is coming from you find your leak quick.