Missing information

[Robert Myers]

Hi Y'all,

Well, I'm even more befuddled than my usual state.  My car has developed a 
miss.  Make that two misses.

Miss #1:  from a cold start cylinder #4 has a miss which goes away after 
driving about 400 yards down the road.  Then this miss simply goes away.  I 
haven't a clue as to the likely cause of this miss unless it's a bad 
plug.  Plug number 4 is a bit darker than the others.  This is either the 
cause or, more likely, the result of the cylinder #4 miss.  I'm hoping new 
plugs will solve this one.

Miss #2:  one cylinder misses once boost gets to about 10 to 12 psig.  I'm 
looking for a weak coil, I think, as the source of this miss.

I'm in the middle of replacing the old Bosch F5DPOR plugs with new F5DPOR 
plugs.  Before completing the swap I disconnected the injector leads and 
removed all the plugs.  All were reasonably tight requiring a bit of effort 
to break them loose.  (Nothing major but they weren't loose.)  I hooked up 
my little adjustable spark tester and adjusted the gap to the point where 
plug #1 was close to not jumping the gap (about 5/8 inch by calibrated 
eyeball) and then tested the spark for the other plugs.  All of them had 
sufficient spark energy to jump that 5/8 inch gap.

Now here is the curious behavior.  Cranking the engine with plugs removed 
and injectors unplugged I observe the odd number coils firing across the 
tester gap with a single spark at every second engine revolution as it is 
expected.  "Snap, tuurrn, tuurrn, snap, tuurrn, tuurrn..."   The even 
numbered cylinders (2 & 4) give a double spark.  "Snap, snap, tuurrn, 
tuurrn, snap, snap, tuurrn, tuurrn...".  WTF is happening?


Bob
Random Bushism: "I wish I wasn't the war president. Who in the heck wants 
to be a war president? I don't." George W. Bush, Washington, D.C., Aug. 6, 2004
_____
Robert L. Myers  304-574-2372
Fayetteville, WV, USA
'95 urS6 - Cashmere Grey
_____