Is this spark knock??

[klst123]

I hear some rattling noise whenever I put gas pedal. like always with acceleration. Is this spark knock or what's this

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[TheRealStreetcommander]

Not great audio, but it does NOT sound like detonation to me. That sounds like your keys rattling or something swinging in your cab.

Spark knock is usually a series of pings at the interval each piston is approaching TDC of the compression stroke. Maybe 2 to 3x faster than the noise I can hear in the video, based on your tach.
My pentastar has detonated only once and it was on moderate acceleration. I attributed it to bad gas.

Try a complete fill up with premium fuel. If its minor spark knock, premium would make it go away.

 

[klst123]

Not great audio, but it does NOT sound like detonation to me. That sounds like your keys rattling or something swinging in your cab.

Spark knock is usually a series of pings at the interval each piston is approaching TDC of the compression stroke. Maybe 2 to 3x faster than the noise I can hear in the video, based on your tach.
My pentastar has detonated only once and it was on moderate acceleration. I attributed it to bad gas.

Try a complete fill up with premium fuel. If its minor spark knock, premium would make it go away.

thx. i used normal gas for a month. think its time to change to high octane gas

 

[Buckhorn]

I hear some rattling noise whenever I put gas pedal. like always with acceleration. Is this spark knock or what's this

Spark knock sounds like a bunch of BBs bouncing off the underside of the hood, on medium to hard acceleration.

 

[TheRealStreetcommander]

Just to clarify, I run regular fuel and do not get detonation normally.

If you determine you do have spark knock, my suspicion would be something else may be out of range.

I’d start with premium fuel, exclusively for diagnostic purposes.

No matter what, I’d Italian tune-up it. That’s a legitimate and effective maintenance method many people just laugh at.

 

[willys 41]

When I first herd spark knock on my 3.6 I was amazed at how bad it was even running high octane gas
What totally eliminated the spark knock was a UPR oil catch can. I have not heard any knocking after in installing oil catch can. Oil mist contaminates the air fuel and lowers the octane
I have also just installed the updated PCV valve (old valve on the left)
In 600 miles I will check and see if the new PCV valve reduced the amount of oil collected in my oil catch can

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