Dick,
I'm not sure the drivability issue and the timing anomaly are related,
though they could very well be and most likely are; I suppose the
drivability issue could be fuel related also. When the car behaved poorly
on this last run I started by checking the basics, such as timing. This is
when I noticed the problem with the timing marks being so far off. The
springs in the dizzy are intact, and allow the breaker plate to move
correctly after dismantling and cleaning, there was some slight binding
before I cleaned everything. The car starts and idles smoothly and
adjusting the timing by rotating the distributor produces the expected
results w.r.t. engine speed and vacuum. You mention a possible cause being
the damper pulley coming loose between the hub and outer ring, is this
something I can check (and fix) easily?
Dave
P.S. I am currently running a Crane XR700 electronic ignition instead of
points.
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Sally or Dick Taylor
Sent: Monday, October 31, 2005 1:41 PM
To: 6pack@autox.team.net
Subject: Re: FW: Ignition Timing anomaly
Dave---I'm not sure I understand the clock references to where the
timing marker is pointing, but I'll proceed as if I do!
There's a couple of possibilities as to what you are seeing. One (less
likely) is that the damper pulley has come loose between it's hub and
the outer ring. (More about this in (possibly) the next 6PACK Newsletter
Issue)
Since a "loose" timing pulley hub will not by itself cause the engine to
act differently, more likely is that the points gap is out of
adjustment. (Points too far apart will cause the timing to advance
proportionally to the wider gap)
It's also possible that the spring(s) that control the advance weights
is/are broken or missing. With the engine stopped, try twisting the
rotor Clockwise. Then CCW, to see if it returns to it's rest position.
Dick
From: murr32@shaw.ca(Dave Murray) Subject: FW: Ignition Timing anomaly
List participants;
Car details:
73, stock (as far as I know), ignition retard removed, timing set at
10BTDC.
Taking advantage of the nice weather, for late October in Calgary, AB, I
took my 6 out for a final? run of the season. The car had a very
noticeable hesitation below 2000 rpm, above this everything was fine.
When I checked the timing I found the timing marks to be nowhere near
the pointer, at ~5 o'clock when viewed from the front. The distributor
was at or near its usual position (for this car since I have owned it),
retard capsule pointed towards the MC. When turning the dizzy to retard
the timing the timing marks would jump to ~11o'clock, advancing the
dizzy would then smoothly advance the timing for a few degrees before
once again jumping to ~ 5 o'clock.
I have a vague recollection, aren't they all, about someone else
experiencing something similar but have been unable to find any relevant
postings. Does anyone have any thoughts as to the cause/solution?
Dave
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