Chevrolet 94840127 Ignition Coil

To check pick up coil first you need to remove the distributor cap, then you have to remove the rotor and you have to disconnect the pick-up coil leads from the module. Short an ohmmeter between the pick-up connector or wire and ground by touching each terminal, one at a time, and take note of the reading; an ohmmeter reading for a good pick-up coil should be infinity; if it is anything less than the pick-up coil is bad. Fourth, switch the ohmmeter towards both terminals on the pick-up coil connector, vacuum to the vacuum advance unit if it exists, and therefore the ohmmeter should read steady a minimum of 500 accompanied with a maximum of 1500 ohms while bending the wires; a failure here also implies a faulty pick-up coil. If the pick-up coil does not pass either test it should be replaced. This is eliminated, and instead, remove the distributor and mark the shaft and gear for gear assembly again. Place the distributor shaft housing in a bench vise; push out the roll pin to removed the gear and tanged washer-, check if there are burr in the shaft before pulling up the shaft. Three of the screws need to be unscrewed to remove the magnetic shield, as well as it is necessary to insert a flat-head screw-driver under the c-clip and turn it and pull out to remove the pick-up coil assembly. Put in the new pick-up coil assembly and make sure that the C-clip is in place, replace the shaft, make sure is clean and greased. Next piece is the tanged washer, fit it in such a way that the tangs are facing up, then the gear and then the roll pin. Rotate the shaft so that the teeth of the distributor shaft do not make any contact with the pick-up coil pole piece; if they make contact then adjust the pole piece and tighten it. Finally, reinstall the distributor.