These are surely things to look at, but setting the timing should be done
last, especially after setting the dwell angle, because setting the dwell
destroys the timing.
BTW, what are your objections to high performance coils?
Best regards
Eric
www.brits-n-pieces.com
Steve:
A guess would be 400 RPM cranking speed. But I would expect it to
start even if the cranking speed were, say, 300 RPM or less.
Some things to check:
1. Spark plug gap. They should be around 0.025" or so. Make sure
they are all correct.
2. Cap and Rotor. Make sure you have the correct rotor and cap for
your model year. The design changed during the production run, and you
cannot mix and match the cap/rotor. Also inspect the inside of the cap to
make sure there is no damage and that the cap is clean inside. Inspect the
rotor for any damage as well.
3. Firing order. Make sure your wires proceed ANTI-CLOCKWISE around
the top of the dizzy cap in the following order: 1-5-3-6-2-4.
4. Spark plug wires. The wires are resistor wires, and can go bad.
If a plug is not firing reliably, try swapping a wire from a cylinder that
does fire reliably. If that solves the problem for the bad cylinder, replace
the plug wires. You can get wires from any good auto parts store. Bosch
makes a set that will fit.
5. Timing. Surprisingly easy to get wrong. Set the timing at 10 BTDC
with the vacuum line to the dizzy disconnected and plugged. The shop manual
is confusing and a failed vacuum pot will give a false reading, so this is
the safest way to get the correct result.
6. Dwell (or point gap). Make sure the gap on the points is correct,
or better yet set the dwell using a dwell meter. If this is wrong, the
points may not open or close fully and missing sparks will be the result.
7. Spark coil. Make sure you have the correct coil. High performance
coils draw more current and if your battery or wiring is marginal, may cause
problems. I do not recommend the use of high performance coils, although
many people have great success with them. Check the resistance of the
primary side of the coil. It should be about 3 ohms if you have a stock
coil.
That will keep you busy for a while. If that doesn't do it, let us
know and we can start talking about the carbs and/or cam timing.
Vance Navarrette
Cogito Ergo Zoom
I think, therefore I go fast
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