08-06-2020, 07:52 PM | #41 |
Senior Member
Join Date: Jun 2010
Location: DFW Area
Posts: 165
|
Re: Spark Question
ok here is one for you
can i use the lower plate with ground wire with the new "modern" upper plate? |
08-06-2020, 08:30 PM | #42 |
Senior Member
Join Date: May 2010
Location: Young Harris, GA
Posts: 1,837
|
Re: Spark Question
Yes.
__________________
Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
Sponsored Links (Register now to hide all advertisements) |
|
08-08-2020, 11:10 AM | #43 |
Senior Member
Join Date: Jun 2010
Location: DFW Area
Posts: 165
|
Re: Spark Question
ok another dumb question. Ground wire go to upper plate or the distributor housing
|
08-08-2020, 12:24 PM | #44 | |
Senior Member
Join Date: May 2010
Location: Young Harris, GA
Posts: 1,837
|
Re: Spark Question
Quote:
The wire from the lower plate connects back to the wire that goes up to the ignition switch, which then goes to the coil + post (in Henry's original wiring scheme -- not the "modified wiring scheme" that many use). This wire CANNOT touch a ground anywhere or the engine will not run (you won't get a spark). This wire goes up and connects to the little nut connector on the side of the modern points, the same place where the condenser connects to. When connecting to the points, it is critical that this wire end NOT touch the upper plate itself or the side of the distributor housing. Those are grounds and they will make the engine not run (you won't get a spark). The points themselves, and only the points, provide the ground to this wire when they close, and take the ground away when they open. Hope this helps.
__________________
Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
|
08-08-2020, 12:54 PM | #45 |
Senior Member
Join Date: Nov 2011
Location: San Diego, CA
Posts: 444
|
Re: Spark Question
To add to what Jim said above - please see the attached picture.
It's the clearest most understandable drawing of the ignition system I've seen; I can't take credit for it - I believe I got it from a previous post on this forum - if someone knows who originated it, please give credit! |
08-24-2020, 09:03 AM | #46 |
Senior Member
Join Date: Jun 2010
Location: DFW Area
Posts: 165
|
Re: Spark Question
Sponsored Links (Register now to hide all advertisements)
I went to a guy who works on A's and and is usually very busy. So busy I cannot get him to help me. I offered to bring it to his shop or he could come to my garage. He came over and after about 20 mins it was running. Again - 'user error' on install. He did out the one in with a ground wire as he too stated he did not like the modern lower plate. Overall - put about 10 miles on it this week end. Shaking the bugs out and now can enjoy. My dad and I started on this when i was in high school. Now I am 62 and he gave it to me before he passed but it was a body off frame etc. After many hours and $ I can now enjoy it and will always come here for any help. many thanks again. God Bless and stay SAFE! |
08-29-2020, 06:16 PM | #47 |
Member
Join Date: May 2019
Location: Delaware
Posts: 32
|
Re: Spark Question
What did he do to fix it besides getting rid of the modern plate? I’m dealing with a similar issue.
Sent from my iPhone using Tapatalk |
|
|
Sponsored Links (Register now to hide all advertisements) |
|