Engine stutters

1999 MAZDA B4000
147,000 MILES • 6 CYL
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KOOKY COOK
  • MEMBER
  • 3 POSTS
a bit of rough idle not bad barely noticeable but at 40mph and above stutters and jerks
Mar 21, 2016 at 10:13 AM
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JOHNNYT73
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 924 POSTS
I would check your spark plug wires of they are old. Sometimes when under a load at speeds a misfire can occur. Also check around for any vacuum leaks.
Mar 21, 2016 at 1:18 PM
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