Miata Mailing List: October 1993, Message #72
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   From: Eric Fancher <75230.1445@CompuServe.COM>
Subject: Help!
   Date: Wed, 6 Oct 1993 23:06:36 -0400

My 91 with 35k on it has developed a low speed stumble in 1st or 2nd gear.  It
has become much worse after removing spark plugs and cleaning them and 
installing new wires.  I have made sure everything snapped together right.  At
mid and high rpms there is no stumble at all.  No miss either.  The plugs are 
split fires with about 20k on them.  They came out looking clean and uniform. 
The wires are the blue NGK's and they suck.  I made sure they fit on right but
they are not a good set of wires.  The upper seal did not fit well and when 
removing one tonight to check to see that the plugs had seated properly, the 
seal that fits around the spark plug insulator stuck with the plug.  I have 
not been able to get it out and will have to get some speacial tools to do 
this.  I was, however, able to fit the wire back together so I can get to 
work.  This did not affect the stumble.  I really don't think the wires are 
the cause of the stumble.

The only reason I did not get the Ultras is that no one had them.  Something 
about the boots not being available from Japan??

Any ideas on the stumble??  Where to get Ultra wires?  And, what is the part #
for the NGK equivilent to the split fire "type" plug (i realize the split is 
in a different place).

Thanks for your help.

Eric Fancher
Tejas Miatas
Austin, Texas