Written by: Mike Ervin
Checking and replacing
the pick-up coil.
- Remove the distributor from
- Remove the rotor and disconnect the pick-up coil leads
from the module as described in the Ignition Module section.
- Connect an ohmmeter to each terminal of the pick-up coil
connector or wire and ground (one terminal at a time). The ohmmeter should indicate
infinite resistance. If it doesn't, the pick-up coil is defective.
- Connect the ohmmeter between both terminals or wires of
the pick-up coil connector. If a vacuum advance unit is attached to the distributor,
apply vacuum from an external source and watch the ohmmeter for indications of
intermittent opens (if no vacuum unit is used, flex the wires by hand). The ohmmeter
should indicate one steady value within the 500 to 1500 ohm range as the wires are
flexed. If it doesn't, the pick-up coil is defective.
- If the pick-up coil fails either test. replace it.
- Mark the distributor shaft and gear so they can be
reassembled in the same relationship.
- Secure the distributor shaft housing in a bench vise and
drive out the roll pin with a hammer and punch.
- Remove the gear and tanged washer, then check the shaft
for burrs. If none are found, pull the shaft from the distributor.
- Remove the three attaching screws and separate the
- Remove the C-clip and detach the pick-up coil assembly.
- Install the new pick-up coil assembly and make sure the
C-clip is seated in the groove.
- Install the shaft. Make sure that it's clean and
- Install the tanged washer (with the tangs facing up), the
gear and the roll pin, using the mark you made earlier to put it back in the same
- Spin the shaft to make sure that the teeth on the
distributor shaft don't touch the teeth on the pick-up coil pole piece.
- If the teeth touch, loosen, adjust and retighten the pole
piece to eliminate contact.
- Install the distributor in the