TwinTurbo.NET: Nissan 300ZX forum - Check that your spark plugs are gapped correctly also.
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Subject Check that your spark plugs are gapped correctly also.
     
Posted by 280ZuL8R on April 23, 2013 at 5:59 PM
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In Reply To Re: Runs rich/momently pressing gas pedal black smoke posted by Z-Driver (FIN) on April 23, 2013 at 03:39 PM
     
Message I had upper rpm hesitation issues right after plug replacement (installed straight from box) yanked them out, cleaned and regapped them shorter and it fixed that issue. Also the plugs will give you a good indication to what's going on in there.

     
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