Here is a longer video with more revs etc.. had a smoke test done and there's no leaks found. No engine codes either. Sound seems to be coming around the cats etc. Not sure where what it could be. Mechanic said he doesn't just want to start waiting for random parts replacement and to come back when a code comes up so he knows where to begin:
https://www.veed.io/view/abeb01ba-874d-4109-a15f-58720e9a1c9a
Quote:
Originally Posted by blue62
The video is with the car stationary so that narrows down the issue considerably.
If it was a vacuum leak big enough to hear when standing next to the car it would not only trigger a check engine light as you mention but the car would shake like hell at idle, Although I doubt it would idle with a vacuum leak that big.
I think the SAI blower only kicks in on cold start and for very short time. So I don't think it is that.
If he had an exhaust leak big enough to be heard it should trigger a lean code and or a Cat efficeincy code.
So diagnostics are narrowed down greatly.
the most likely issue is one of the three things I mentioned.
or the engine bay cooling fan as you mention.
In the video it sounds like a "rotational mass squeak" to me.
But it is a 12 second video at idle only so there's that.
If he would have run the video longer and varied engine speed just a little I could have listened for if and how the sound changed.
That can be telling at times.
If he removes the fan belt and runs the engine for a few minutes he can either eliminate three possible suspects (if the sound is still there) or narrow the issue to one of three suspects (if the sound is gone).
So it would be a good diagnostic gain for the time spent.
Woops
four suspects I forgot about the air-conditioner pump.
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