WHAT WOULD CAUSE A MUFFLER RATTLE, CAR SHAKE WHILE DRIVING, AND ENGINE "MIS-FIRE" AT HIGHER SPEEDS?

  • Tiny
  • sschuette
  • 2001 Mazda Tribute
  • 95,000 miles

The problems first appeared after driving through some low spots in the road filled with rain and then disappeared completely for several days before re-appearing while on a longer drive today under normal driving conditions.

Monday, November 21st, 2011 AT 12:00 AM

2 Answers

  • Tiny
  • rivermikerat
  • Expert
  • 6,118 posts

Muffler rattle could be a loose heat shield. Car shake is most likely a tire/wheel out of balance. Misfire could be bad plug or wire, or a weak valve spring. Check engine compression.

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Monday, November 21st, 2011 AT 12:05 AM
  • Tiny
  • mhpautos
  • Expert
  • 29,787 posts

Get under the car and thump the muffler, if it rattles you will have a collapsed baffle or internal pipe, this may also cause a back pressure in excess of normal allowances causing the tune problem as well.

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Monday, November 21st, 2011 AT 12:06 AM

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