Mazda Millenia Problem Report

Mazda Millenia Misfires Under Load

(27 reports)

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.

Valve cover s leaking oil into plug wells shorting out spark plugs -
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. -
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 -
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 -
I replaced the distriuter cap now I don't know what plug goes where in the right order. -
Car has misfire in 3rd cylinder also has oil in 3rd cylinder around spark plug -
Car keeps dying on me! runs great in morning come home from work cant make it home. -
Once the engine warms up, it begins to stall, then doesn't start again till cooler. One out of one misfire shows up on cylinder 6,which has small amounts of oil at the base of the plug. After restarting, loss of acceleration and eventually stalling occurs. The engine is hot, but doesn't read high, and all fluids check normal. No vacuum leaks either. Plugs, wires have been replaced, all plugs sparkplhg. I'm seeing a minor leak behind the lower back to the left of the timing case. -
Cylinder 6 misfires causing check engine light to appear. Replaced plugs & boot (on #6). Hope this works. -
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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