> > Also I found some cracks on the plastic of the distribtor housing.
Do I
> > need to replace the housing?
>
>
> You mean the distributor cap? Then yes.

No. It is a part of one of the rotational sensors in the base/housing.
The rotor part of the topmost sensor has a color indicating of going
through a very high temperature, and the stationary plastic part with a
metal contact (I do not know the name) has small cracks. I don't know
how these rotational sensor work. It would be wonderful if someone can
explain it.
While tring to remove the distribtor rotor, I might damage the top
sensor rotor because I pried the distributor rotor agaist it. The
distribtor has no dust inside.

Is it possible the ignition system produces no sparks because the top
rotaional sensor is bad? My plan is to install a rebuilt distributor
with the ignitor. If it does not work, I will replace the ignition
coil. The coil looks fine and every resistance is within the specs.
Anyone has any suggestion about this approach? If the car still does
not start after replacing the distributor and the coil, I really do not
what to do next. For now, I will just cross my figures.

Thanks.