Car Problem Reports

Mazda Millenia Misfires Under Load

Mazda Millenia Problem
26 Reports
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Model Years Affected: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002

Engines Affected: 2.3L V6 Supercharged, 2.5L V6

Average Mileage: 156,432 mi (65,000 mi - 230,000 mi)


Misfires under load (acceleration) can be caused by the valve cover gaskets leaking oil into the spark plug wells shorting the spark plugs to the cylinder head. New spark plug wires will be needed and the valve cover needs to be resealed.

  • Visitor, , 2.5L V6, 75,000 mi

    Valve cover s leaking oil into plug wells shorting out spark plugs

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  • Visitor, , 2.5L V6, 175,000 mi

    Check engine light came on and started blinking and then it started to sputter. Checked it out with the computer and came back three codes PO400, PO404 and PO406. Cylinder six is misfiring.

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  • Ricky Ric, , 2.5L V6, 156,731 mi

    loss of Acelebration. when I get about 40/45 miles an hour its misfiring and shaking I've changed the wires and plugs and the valve cover gasket but it still doing it don't know what to do

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  • Visitor, , 2.5L V6, 115,000 mi

    Misfire in the 3rd cylinder, oil found in the spark plug wells, oil leak from the valve cover. I took the car to the shop and they will replace the valve gasket for $400, hoping that could solve the problem

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  • Mikeseavers1989, , 2.5L V6, 194,000 mi

    Car has misfire in 3rd cylinder also has oil in 3rd cylinder around spark plug

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  • Visitor, , 165,000 mi

    Car keeps dying on me! runs great in morning come home from work cant make it home.

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  • Visitor, , 2.5L V6, 137,000 mi

    I replaced the distriuter cap now I don't know what plug goes where in the right order.

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  • Visitor, , 2.3L V6 Supercharged, 65,000 mi

    Cylinder 6 misfires causing check engine light to appear. Replaced plugs & boot (on #6). Hope this works.

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  • Visitor, , 2.5L V6, 123,000 mi

    I was just doing some routine maintanance changing the plug wires and spark plugs and when i got to the back 3 spark plugs i noticed the first one was dripping with oil and oil was puddle in where the spark plug goes. The job calls for 3 and a half hours labor. Does not sound fun.

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