[Joshuaspurgin418]

I've recently discovered when my car runs a few minutes before leaving my work. It hums(Idles) like a diesel engine. I checked my oil which is good. Belts are all good. I just can't figure it out.

BTW It takes Regular Unleaded, not a diesel engine.

Here's a video of what it sounds like, couldn't record my own. camera wouldn’t pick it up
LINK:

I'm 16, this is my first car and love it want to take good care of it.
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[tommyb250]

my "96 960 sounds just like a diesel.

my "96 960 also has a sound at idle like a knock/tick..that video (audio) is great. that is a hard sound to describe. mine isn't quite as loud as the video, but mine sounds just like a diesel car. valves ?, leaks ? It has power and runs smooth. just did fresh oil, filter, air filter, spark plugs, serpentine belt, oil cooler lines. HELP!!