Misfires Under Load on Mazda 626

Misfires under load (acceleration) can be caused by leaky spark plug boots. When a spark plug boot leaks, it allows the spark to arc, or jump, to the cylinder head. If evidence of arcing can be seen on the inside of the spark plug boot, new spark plug wires will be needed.

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Average mileage: 136,505 (18,200–199,328)
Engines affected: 2.0L 4 Cylinder, 2.2L 4 Cylinder, 2.2L 4 Cylinder Turbo, 2.5L V6
13 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
20 people reported this problem
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problem details
1995 Mazda 626 - 2.2L 4 Cylinder 199,328 mi,
Engine shutters under load plus very rough idle.