<VV> #4 misfire, exhaust 'spit'

[Western Canada CORSA]

I had a similar problem on a 'vair with a newish cap once.  Carbon streak
between two of the towers inside the cap was causing the misfire.

Regards,
Joel

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org]On Behalf Of Michael Kovacs
Sent: Friday, July 07, 2006 4:46 PM
To: VV
Subject: <VV> #4 misfire, exhaust 'spit'


 I wont go into all the info, but the engine is rebuilt with all the good
stuff. .060 over and new rings and valves and associated parts. Problem is
#4 is misfiring,

   The left bank has a spit sound. The right bank sounds like a Corvair
should. I pulled the #4 wire while the engine was running and the spit sound
stops. It starts again when the wire is reattached. Oh yeah, the #4 spark
plug did not appear like it was firing (others are a bit sooty, this one is
too clean) when I pulled it. Compression is 150 +.

   New 7mm silicon wires did not cure the misfire, The cap is new and the
petronics 2 is running 12 volts into a .6 ohm flamethrower. Engine starts at
touch of the key, timing now at 12 degrees.


   Valves adjusted cold, then hot. I'm using 3/4 turn in after clatter. I am
temped to try another hot adjustment on #4 exhaust (and maybe intake?) while
listening to the exhaust.

   I had given the valves a slight lap prior to reinstalling and looked like
a perfect line seal. There is only 50 miles on it (today) and ran like a 5
cylinder. Absolutely no other noise from the engine so it should not be a
bad exhaust seat as they were all well in.

   I wont pull the head off again as I don't know what to look for and the
national is too close with no time to mess with it.

   If I can't cure the misfire, I'll have to take the '69 convertible. I was
hoping to give the 'trailer queens' a run for best in show, but not this
time I guess.

   Anybody have a clue as for what to look for???


MIKE KOVACS
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