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engine knock

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Old Apr 16, 2017 | 06:46 PM
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engine knock
hey everyone I got a 1990 f150 with a 351 4x4 when I got the truck it had no muffler on it and running everything sounded fine well I put a glasspack on it now sounds like it has a rod knocking if I take the muffler is goes away any ideals thanks.
 
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Old Apr 16, 2017 | 07:03 PM
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You may have an exhaust leak in the engine bay.
 
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Old Apr 16, 2017 | 08:47 PM
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I was kinda thinking the same thing thanks for the help i appreciate it.
 
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