No matter what's happened before with my car, one never heard this type of noise, was highly disconcerting this morning in my way to work, luckily I don't go far, but the sound is obvious, like a bad muffler or an old clunker... There is DEFINITELY some loss of horsepower when initiating movement and I think even while driving.
I can also FEEL the vibration on the gas pedal when I press on it.
Not a good feeling at all... I'm hoping it's just something loose but.....
One disclaimer... I did have the stock muffler replaced with an M3 or M3 style muffler several years ago when I hit my engine replace. It sounds way better than stock ZHP (and about 25% louder) and I've never looked back, until now.
Ideas? Tests?
Here is the sound:
While stop and go driving in gears 1-2:
https://youtu.be/M-it-z3aLoM
Idle:
https://youtu.be/6UASAn23_I8
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