EGR rattle? (1 Viewer)

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Steve D

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Jan 7, 2016
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Atlanta, Georgia
I've searched but can't seem to come up with anything.

At highway speeds and mid- to high rpms (~3k), with very light throttle there is a loud rattling noise. It isn't at a specific rpm so I don't think it is a harmonic rattle of a heat shield or exhaust clamp.

A lift off the throttle or adding more pedal makes the noise go away.

Before I throw some parts at it, does this sound like a failing/failed EGR? My OBD-I truck isn't throwing any codes.
 
Is it pinging?
 
No, definitely not pinging. It happens under very, very light throttle.
 
Heat shield loose perhaps
I thought the same but it doesn't seem RPM dependent. I'll poke around and double check that though.
 

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