308 2015 1.0 L FSH low miles engine noise video

[DICKY300]

Hi.
My sons 308 has low mileage and has always been on the button.
Recently sounds lumpy.
But when i opened bonnet there seems to be a audible hum (and a ringing) which you can hear clearly sigh off when turned of at key.
Link to video .
Am i being paranoid . Is it just getting old ?
A second opinion from some one wpuld help . Ive heard and seen from posts there is some really good experience in here. Just looking for things to check or ask at garage .



Thanks

[Huskyxantia]

Sounds like one injector has or is failing , so the throttle body is working a bit more to compensate for this by way of the ecu adding more fuel or air or both, someone in here will hit the nail on the head , does the noise change when you rev it, have you got a diagnostic tool ? I know when injectors go they can change the sound of an engine make a petrol sound like a diesel ...

[Huskyxantia]

Sounds like its a bit low on oil too, also the throttle body's on these can get a bit gunked up and the butterfly inside , it's a flap that opens and closes, this can get sort of stuck and wont operate properly and cause this noise to happen to the engine , plus the wet belt when they degrade it can cause similar things too. Best thing is to get it diagnosed, find a friendly local mobile mechanic , dont do main dealer they will be so expensive, your end up getting rid of the car that way, plus ask the son nicely if his right foots been a bit heavy.. hope some of my theories help

[DICKY300]

Sounds like one injector has or is failing , so the throttle body is working a bit more to compensate for this by way of the ecu adding more fuel or air or both, someone in here will hit the nail on the head , does the noise change when you rev it, have you got a diagnostic tool ? I know when injectors go they can change the sound of an engine make a petrol sound like a diesel ...

Thanks You, Yes that's the sort of thing I thought. It starts , idle flicks to 1200 rpm then drops to about 750 if I hold it higher at 800 everything seems better. Seems to pull away fine , but we regularly do 4 miles on a dual carriage way and I feel its getting slower the top , where as it would keep pulling to 80 (if needed ) before. Sounding like a diesel was how I described it.

[DICKY300]

Sounds like its a bit low on oil too, also the throttle body's on these can get a bit gunked up and the butterfly inside , it's a flap that opens and closes, this can get sort of stuck and wont operate properly and cause this noise to happen to the engine , plus the wet belt when they degrade it can cause similar things too. Best thing is to get it diagnosed, find a friendly local mobile mechanic , dont do main dealer they will be so expensive, your end up getting rid of the car that way, plus ask the son nicely if his right foots been a bit heavy.. hope some of my theories help

I went for the oil first , but it was changed 10 days ago , showing 80% full but clean. The belt looks good I bought a tool when I got the car that tests to see if there is any swelling, All looks shiny and new.

I went back to the garage where the MOt's and serving was done . But I feel fobbed off as the it would be an admission of something they've done. Also think it might be worse now than when I dropped of. indicating something is wearing out.