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1846 Views 3 Replies 3 Participants Last post by  Testosterone
For the last several weeks I have been hearing a popping noise similar to when a rock flies up under the truck. It seems to be coming from the area near the catalytic converter, similar when the truck cools down you hear the "popping" noise. It seems to only do it for the first five minutes or so, like it is coming up to temperature.

Anyone experienced this??

Chris /ubbthreads/images/graemlins/shrug.gif
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I only have the 5.4L but I've never heard that before.

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