WHAT WOULD CAUSE A MUFFLER RATTLE, CAR SHAKE WHILE DRIVING, AND ENGINE "MIS-FIRE" AT HIGHER SPEEDS?
2001 Mazda Tribute
November, 21, 2011 AT 12:00 AM
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.
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.
November, 21, 2011 AT 12:06 AM
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.