How
to check distributor
cam wear with a
timing light
Article/picture
from Equus Tech
Tips http://www.timinglight.com/resource/techtips.cfm
Perform
this test after the
timing has been set
and the timing mark
lines up with the
reference pointer
for the No. 1
cylinder.
Connect timing light
to spark plug wire
directly opposite
(180 degrees) of the
No. 1 cylinder on
the distributor cap.
Start engine and aim
timing light towards
timing mark. Reading
should be the same
as when timing light
is connected to the
No. 1 cylinder.
(Timing mark should
line up with
reference pointer).
If reading IS NOT the same, you may have a worn distributor cam or bushing, or a bent distributor shaft. Repair as necessary.