2000 Ford Ranger Spark Plugs

2000 FORD RANGER
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TECHIEMAN316
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  • 3 POSTS
Engine Mechanical problem
2000 Ford Ranger 6 cyl Four Wheel Drive Automatic 100K miles

What would cause spark plugs to wear out quickly. I have replaced (2) plugs in CYL 3 in less than a year. Engine code P304 says misfire at CYL 4 but the plug at CYL 3 is the culprit.
Oct 26, 2008 at 12:44 AM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
A weak injector can cause the cylinder temp to rise due to lean mixture and can burn them up.Are you using Motorcraft plugs? If so it could be the injector.Spray around the intake runner with carb cleaner too to be sure there isnt a vacuum leak leaning out the cylinder, the idling rpm will change if there is a leak and you spray it
Oct 26, 2008 at 1:35 AM
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