I noticed about a week ago that my volt meter in the dash was pinging out at 16V intermittently. It happened during a 20 minute drive for a solid 5 minutes on the interstate. Not sure what happened in the meantime (I was able to drive home, no issue), but then the truck wouldn't start the next day.
First, I checked fuel. Plenty in the bowl and getting to the carb. Check.
Next I checked my battery with my digital multimeter. It was reading 11.5, so I charged it overnight. I suspect the voltage regulator is gone on my alternator, so ordered a replacement alternator/reg combo, but got the volts up to 13.5 after an overnight charge. Still won't start.
Next I checked to see if I was getting a spark off of the ingniter/coil assembly by disconnecting the distributor/plug wire from the dizzy and attaching directly to a plug. No spark when my wife turns the motor over.
I also checked the fusible link at the battery, all three points have continuity.
I then checked the coil by the touch and go method described here: Testing the ignition coil - https://forum.ih8mud.com/threads/testing-the-ignition-coil.196883/ . Coil works/I got a spark when its disconnected from the igniter.
So I think I'm down to the ignitor, but I can't be sure because the igniter also has a 2 prong female plug that goes to the base of the distributor. I can't figure out how that wiring works, but saw somewhere that the resistance across those plugs is supposed to be <5 ohms. I measured 156 ohms when I attached my digital multimeter to both prongs.
So is it the igniter? or the distributor? or something else? Any help is greatly appreciated.
First, I checked fuel. Plenty in the bowl and getting to the carb. Check.
Next I checked my battery with my digital multimeter. It was reading 11.5, so I charged it overnight. I suspect the voltage regulator is gone on my alternator, so ordered a replacement alternator/reg combo, but got the volts up to 13.5 after an overnight charge. Still won't start.
Next I checked to see if I was getting a spark off of the ingniter/coil assembly by disconnecting the distributor/plug wire from the dizzy and attaching directly to a plug. No spark when my wife turns the motor over.
I also checked the fusible link at the battery, all three points have continuity.
I then checked the coil by the touch and go method described here: Testing the ignition coil - https://forum.ih8mud.com/threads/testing-the-ignition-coil.196883/ . Coil works/I got a spark when its disconnected from the igniter.
So I think I'm down to the ignitor, but I can't be sure because the igniter also has a 2 prong female plug that goes to the base of the distributor. I can't figure out how that wiring works, but saw somewhere that the resistance across those plugs is supposed to be <5 ohms. I measured 156 ohms when I attached my digital multimeter to both prongs.
So is it the igniter? or the distributor? or something else? Any help is greatly appreciated.