[AT] Firing on two instead of four

[Lew Best]

Any chance it could be crosswired?  I've seen this happen several times;
on any 4 cyl engine I've seen it'll "hit-miss-hit-miss" sounding pretty
good (skipping every other beat) but very little power (the 2 crossed
wires firing on the exhaust strokes).  Just try switching wires straight
the cap & you'll know; if it is cross wired & you switch the correct 2
it'll run great; if you switch the incorrect 2 it won't run at all. 

Lew Best near Waco, TX


-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Tim Nobles
Sent: Saturday, November 25, 2006 6:48 PM
To: Antique tractor email discussion group
Subject: [AT] Firing on two instead of four

Hey,
    I was playing a short time today with my Case SC which I got at the
end 
of the summer.  It had sat for a few years.  I couldn't get it to fire
at 
first when I picked it up in August, but just put in four new plugs and
it 
ran great.
    Anyway, lately it has been running on just two cylinders.  So I took
the 
plugs out and cleaned them and laid each individually down and turned
the 
engine over.  Had strong spark in all four.  But still only running on
two. 
Had a new spark plug wire which I tried and still the two would not fire

when tractor was running.  Even switched the good wires to the bad plugs
and 
vice-versa....same results.
    My last test was I pulled the wire to the plugs which were not
firing 
off the distributor cap while the tractor was runnining.  As I held it
about 
1/2 inch from the distibutor, it arced and fired.  Did the same with the

other wire which wasn't firing.  Cleaned the contacts and reconnected
the 
wires.  Same old thing.
    Suggestions???  Is the distributor bad?  Tried to look close for
cracks 
or wear.  Looking for the next step.

    Thanks.  I don't contribute much anymore, but still lurk.

Tim Nobles
tnobles at netsync.net 

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