Nasty vibration resonance, starts around 3300rpm, is really bad between 3500-4500 then tails off somewhat. There's an impression that the whole engine has become very 'harsh' because of it. Noticed it slightly for almost a couple of weeks or so, then it became bad pretty instantly.
Engine has a louder induction 'type' noise that started exactly the same time.
'Possibly' down on low end power too.
My first thought is it's a cracked or broken manifold somewhere, likely around the cat as there is also a wavering idle too.
Car is on a ramp tmrw but wanted to see if there is any other things worth looking into that others may have come across.
FYI - car is 100% standard.
Cheers
Engine has a louder induction 'type' noise that started exactly the same time.
'Possibly' down on low end power too.
My first thought is it's a cracked or broken manifold somewhere, likely around the cat as there is also a wavering idle too.
Car is on a ramp tmrw but wanted to see if there is any other things worth looking into that others may have come across.
FYI - car is 100% standard.
Cheers