1999 Mazda 626 misfiring

1999 MAZDA 626
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UNCLE
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  • 1 POST
I have a 1999 Mazda 626 that has a cylinder 1 misfire. I have changed plugs, wires, coil, injector, and oxygen sensors using only OEM parts. Still, this car is misfiring on the #1 cylinder! All cylinders are at 180 pounds on compression tests, and the plug IS firing. What am I missing?
Feb 3, 2006 at 9:51 PM
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COSMO
  • ✓ASE Certified Mechanic
  • 347 POSTS
  • ASE Certified Mechanic
If you car is a 4cyl I would have a good look at the ignition coil that is on the side of the cyl head (this also applies to the v6) and look for any disdoloring inside the wire holes and look for cracks or arcing on the body of the coil. Also it would be a good idea to make sure the intake manifold gskt (4 cyl) is not leaking.

Cosmo...Mazda Tech
Feb 4, 2006 at 2:17 PM
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