2001 Ford F-150

Tiny
JAMES HAUGHTON
  • MEMBER
  • 2001 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
Why does my truck mis under a load? And it makes a knocking noise at the muffler.
Tuesday, September 8th, 2009 AT 6:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
If you hear a knocking noise, chances are the inside of the catylatic converter or the muffler is lose inside. That whould cause a knocking sound and it could cause a miss.

Take a rubber mallot and tap on the muffler and converter. See if there is a noise there.

Let me know what you find.
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Thursday, September 10th, 2009 AT 7:24 AM

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