Found my mysterious "Ping"

[stng]

So several months ago I posted a thread related diagnosing an engine ping. The long and short of it was that my car made, what sounded exactly like a pinging sound when I was accelerating from 2500-3000 rpms. Well my fellow :SNSign: members were able to help me rule out that it wasnt a ping, but I was never able to figure out what it was. Today however I figured out what it was, the backing plate/shroud for my front left rotor was loose and rattling, but for what ever reasons I could only hear it at the above mentioned rpms... It was just barely loose, but it was enough to cause the sound. Anyways if anyone has a mysterious, marbles rolling around in a coffee can sound it wouldnt hurt to check out the backing plates...

 

[sgarlic]

Good bit of info. Nice job.

 

[Tx01Muscle]

Hello. So, what exactly did you do? Can you actually tighten this plate down, or did you just bend it back so it wouldn't vibrate? I am getting a "knocking" from my engine as well, and it sounds like a metal ball bouncing back and forth at around 2,000-2,500 rpm, and when I start the car.

 

[Roland69]

My 95 did that to me....took a few days to find that that's what it was lol