The Ford Barn

vetpenny · 12-10-2022, 11:38 AM

My 1935 ford is difficult to start after I have run it for about 10 miles. If I let it sit until the engine cools down it starts immediately. I suspect that I have a bad coil but would welcome any comments or advice that anyone can give me. Thanks for your help.

tubman · 12-10-2022, 11:46 AM

Does it turn over as fast when it's hot as it does cold? There's currently another thread going on this very subject.

Seth Swoboda · 12-10-2022, 11:49 AM

I had a coil act up once where when it got hot it broke down and quit. It would do this to me while driving. It was like I threw the ignition switch "off". It is possible.

marko39 · 12-10-2022, 11:51 AM

the first thing to do on a no start is see if you are getting a good spark. if not, it could be the coil but it may also be the condenser which would be the first thing to replace. if you determine its the coil its better getting yours rebuilt than buying a new one.

JayChicago · 12-10-2022, 11:52 AM

Quote:

Originally Posted by vetpenny

My 1935 ford is difficult to start after I have run it for about 10 miles. If I let it sit until the engine cools down it starts immediately. I suspect that I have a bad coil but would welcome any comments or advice that anyone can give me. Thanks for your help.

Yep. Bad coil or bad condenser. Both will often work fine when cold, but then fail when warm. (not warm from under-hood temperature, warm from operating under electrical load) I don't know how to tell which is the culprit since both give the same weak-spark symptom.

Gene1949 · 12-11-2022, 10:54 AM

Sponsored Links (Register now to hide all advertisements)

6 volt electrical systems operate at much higher amperage loads. I think todays repop/rebuilders fail to build to NOS specs

dean333 · 12-11-2022, 11:12 AM

Send that coil to Skip Haney.

slowforty · 12-11-2022, 01:59 PM

Check your ignition resistor also. I had one that would not fail completely. And drove me nuts trying to find the problem

Veeder · 12-11-2022, 03:56 PM

Run a wire direct from battery to top of coil see if it starts if it does likle battery voltage to low to start ith the ignition resistor in the ckt.

But srt by bypassing all the other possabilities first

oldskool · 12-11-2022, 04:54 PM

bad coil ,condenser or gas boiling in carb ez fix with 1/2 insulator under carb

12-10-2022, 11:38 AM	#1
vetpenny Senior Member Join Date: Oct 2014 Posts: 103	Possible bad coil My 1935 ford is difficult to start after I have run it for about 10 miles. If I let it sit until the engine cools down it starts immediately. I suspect that I have a bad coil but would welcome any comments or advice that anyone can give me. Thanks for your help.

12-10-2022, 11:46 AM	#2
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,320	Re: Possible bad coil Does it turn over as fast when it's hot as it does cold? There's currently another thread going on this very subject.

12-10-2022, 11:49 AM	#3
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 3,795	Re: Possible bad coil I had a coil act up once where when it got hot it broke down and quit. It would do this to me while driving. It was like I threw the ignition switch "off". It is possible.

12-10-2022, 11:51 AM	#4
marko39 Senior Member Join Date: Oct 2016 Location: harpursville ny Posts: 1,040	Re: Possible bad coil the first thing to do on a no start is see if you are getting a good spark. if not, it could be the coil but it may also be the condenser which would be the first thing to replace. if you determine its the coil its better getting yours rebuilt than buying a new one.

12-11-2022, 10:54 AM	#6
Gene1949 Senior Member Join Date: Jun 2016 Location: Pahrump, NV Posts: 374	Re: Possible bad coil Sponsored Links (Register now to hide all advertisements) 6 volt electrical systems operate at much higher amperage loads. I think todays repop/rebuilders fail to build to NOS specs

12-11-2022, 11:12 AM	#7
dean333 Senior Member Join Date: Jun 2012 Location: Shorewood Illinois Posts: 863	Re: Possible bad coil Send that coil to Skip Haney. __________________ Tim Carlig

12-11-2022, 01:59 PM	#8
slowforty Senior Member Join Date: May 2010 Location: Tinley Park Ill Posts: 1,062	Re: Possible bad coil Check your ignition resistor also. I had one that would not fail completely. And drove me nuts trying to find the problem

12-11-2022, 03:56 PM	#9
Veeder Senior Member Join Date: Dec 2012 Location: CT Posts: 394	Re: Possible bad coil Run a wire direct from battery to top of coil see if it starts if it does likle battery voltage to low to start ith the ignition resistor in the ckt. But srt by bypassing all the other possabilities first

12-11-2022, 04:54 PM	#10
oldskool Senior Member Join Date: May 2010 Location: shirley ny Posts: 992	Re: Possible bad coil bad coil ,condenser or gas boiling in carb ez fix with 1/2 insulator under carb