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Mazda B4ooo running rough

Tiny
MEANGENE256
  • MEMBER
  • MAZDA TRUCK
I have a 94 Mazda B4000 with 304,000 miles on it and it ran fine until a few months ago. Now it idles a little rough, but mostly misses when it is under a load, like driving in too high of a gear, and when I run my a/c. I just replaced the plugs a couple months ago, any ideas, besides the high mileage?
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Saturday, April 15th, 2006 AT 2:36 PM

2 Replies

Tiny
LOSONE
  • MECHANIC
  • 1,616 POSTS
That is a Ford 4l engine and the coil packs are a prime suspect. They are a medium failure rate. Good luck
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Saturday, April 15th, 2006 AT 5:48 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
I agree it could be other items in spark path. Or mixture is leaning out.
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Monday, November 14th, 2011 AT 6:49 PM

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