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Engine Sputter & System Charging; Engine runs fine & no charge.
Noah posted a topic in P15-D24 Forum
Hey all, I've got an issue I can't seem to figure out. Seems pretty odd to me and I can't even make sense of why it would happen. Motor is a 218CI Flathead six out of a '49 plymouth. It's installed in a '57 Dodge D100 pickup. The engine started running a bit rough, a bit of a sputter, when accelerating. Also, it did not want to start hot, wait 15-20 minutes and starts. The ammeter was broken and the battery died so I went ahead and replaced the ammeter, battery, generator (yes, I polarized it) , voltage regulator, coil, fuel pump, added a couple ground straps, reset the breaker points. I fired it up and it ran fine for about two miles, then almost instantly it started sputtering. When it was running fine it did not show a charge so I thought maybe I received a bunk ammeter. When it started sputtering, simultaneously it also started showing a nice charge. I thought it was a coincidence. I took it back to the shop and checked all the grounds, wiring resistance and connections and routing. All looked good. I took it out again and seemed to be running fine so I drove for about 20 minutes putting it through the paces, with no issues, EXCEPT, it's not showing a charge now, showing a slight draw. Finally got on the highway and at top end picked up a slight sputter. While limping back home the sputter got a bit worse. Also, need to mention simultaneously with the sputter returning, the ammeter now shows a charge. I can't place the relationship, anyone have any thoughts? Could it be the distributor? Points? I'm fairly certain it's an electrical issue due to the simultaneous misfires/sputtering aligned with the charge showing on the ammeter. Thanks in advance for taking the time to read this and respond. Located in North San Diego if anyone nearby wants to check it out. -
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Polarization restores the residual magnetism in the cores of the generator field poles so that when the generator starts charging it will do so in the proper polarity. It is usually not necessary to re-polarize unless the generator has been removed and repaired or the regulator has been changed. If this has occured, then re-polarization should be done before starting the engine. Otherwise, the generator may not charge or it could charge in the reverse direction. Re-polarizing is relatively easy to do. All that is necessary is to briefly connect the generator armature to the battery hot terminal. The most convenient way to do this is to take a short jumper wire and touch it to the "Batt" and "Gen" terminals on the voltage regulator. At the moment of contact you should see a slight spark. This indicates that the process is completed. It should be noted that it is the generator that is being polarized, not the regulator.
