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wierd sound when truck is off !?!

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Old Jan 16, 2006 | 06:13 PM
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OskeesLightning's Avatar
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From: miami,Fl
wierd sound when truck is off !?!
ive notice when i shut my truck off and wait for about a minute or so the exhaust makes like a loud bang sound once in a while, as if you were to flick a rock at a pipe? any ideas what the heck that might be???
 
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Old Jan 16, 2006 | 06:46 PM
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wittom's Avatar
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I haven't heard in on my '04 yet but my '98 did that. I believe it was just the exhaust expanding and/or contracting. I didn't have the stock exhaust.
 
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Old Jan 16, 2006 | 07:05 PM
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Probably one of the cats pinging - they tend to do that.
 
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Old Jan 17, 2006 | 01:21 AM
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Originally Posted by fullboogie
Probably one of the cats pinging - they tend to do that.
Agreed - mine does the same thing after a run, and when I checked, it was the cats. Nothing to worry about.
 
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Old Jan 17, 2006 | 05:29 PM
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Perfectly normal. All 3 of my f-150s have done it (2 Lightnings).
 
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Old Jan 17, 2006 | 07:19 PM
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From: JASPER,ALABAMA
Originally Posted by fullboogie
Probably one of the cats pinging - they tend to do that.
 
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