Mechanics

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

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.
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Sschuette
November 21, 2011.




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.

Rivermikerat
Nov 21, 2011.
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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Mhpautos
Nov 21, 2011.

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