If the misfire goes away with a richer mixture then you already know what gap 
works well with your coils.   I'd suggest moving the spark to a different 
location (by switching between normal and extended reach plugs) in the hope 
that the other location might be a little richer.
  ----- Original Message ----- 
  From: Robert McElwee 
  To: Miata Power List 
  Sent: Wednesday, August 20, 2008 3:31 AM
  Subject: lean mixture causing the engine to miss fire


  I've got my A/F leaned out during cruising and I am getting some miss fire. 
So, do I widen the plug gap ("bigger" spark) or close the gap (more chance to 
create a spark)?



  -- 
  Robert McElwee and Blue Flash
  "The 50 MPG Miata"
  www.lightweightmiata.com/mpg

  Lightweight Miata Forum:
  www.lightweightmiata.com/forum

  The Miata Trailer Project:
  www.lightweightmiata.com/trailer




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