Posted By |
Discussion Topic:
Weak starter motor after long runs (Hot Engine)
-- page:
1
2
|
|
classiclover |
04-30-2022 @ 11:34 AM
|
|
|
Member
Posts: 73
Joined: Aug 2021
|
Thaanks again to all
|
40 Coupe |
04-30-2022 @ 8:03 AM
|
|
|
Senior
Posts: 1678
Joined: Oct 2009
|
The cracked coil can also be from a bad rebuilding. If you remove the coil look for electric pencil etchings on the bottom of the coil could indicate it has been rebuilt. If the resistor is jumpered or bypassed electrically or if the ignition switch is left ON it will also destroy the coil. The best place to go for a rebuilt coil is Skip Haney in Punta Gorda Fla. 1-941-637-6698 You want a brown in color coil with Ford script on top not the Black in color. He may have one in his shop. A cracked coil will not effect the starter motor like yours is effected.
This message was edited by 40 Coupe on 4-30-22 @ 8:05 AM
|
TomO |
04-28-2022 @ 6:35 AM
|
|
|
Senior
Posts: 7256
Joined: Oct 2009
|
Please repeat the tests that I asked you to do in your other post and post the results. They will give me a better idea of wht is going on.
Tom
|
classiclover |
04-28-2022 @ 4:25 AM
|
|
|
Member
Posts: 73
Joined: Aug 2021
|
Tom Thks again. I am continuing to learn every day about about my 40. I will get the test results posted on the Ballast resistor. I too was not understanding why any fuel would keep the engine from turning over. Could affect it starting, but still should turn over
|
TomO |
04-27-2022 @ 5:22 PM
|
|
|
Senior
Posts: 7256
Joined: Oct 2009
|
If you have the coil on top of the distributor, the ballast resister must be connected. You can check this by connecting your voltmeter between the input to the coil and ground. Turn on the ignition switch and read the meter. It should read around 3volts. If it reads more than 3.5 volts, check the wiring under the dash to make sure that the ballast resister has one wire on each terminal. One wire should be red and the other should be red and black. The radio and heater wires may also be on the same terminal as the re and black wire. I do not understand how any fuel could make the starter crank slowly. I have been using gas with ethanol since the mid 1990's and my starter has only been slow when the brushes were worn. You never did post the results of the tests, you just say that they did not indicate a source of the problem. In order to help you I need to know the readings that you got for each test.
Tom
|
classiclover |
04-27-2022 @ 9:34 AM
|
|
|
Member
Posts: 73
Joined: Aug 2021
|
Hi Tom My research shows I have a ballast resistor in ignition circuit. It was replaced a few yrs ago. I have been advised by some local classic guys that these older flatheads do not like the new gas with all the alcohol in it. They say it boils at a very low temp and they have had similar problems. One recommendation, was to start using Efree gas and or install an electric shutoff valve between fuel pump and carb so that you shut off fuel flow before you turn off the engine. He explained the physics of it to me and it made sense. I have pics of it installed. Your thoughts on this
|
classiclover |
04-22-2022 @ 12:49 PM
|
|
|
Member
Posts: 73
Joined: Aug 2021
|
Tom Thks for the input. Can you be more specific on the "Ballast Resistor" recommendation and replacing the coil.
|
TomO |
04-22-2022 @ 7:29 AM
|
|
|
Senior
Posts: 7256
Joined: Oct 2009
|
The coil cracked because it was overheated. This is usually caused by not having a ballast resister in the ignition circuit.
Tom
|
classiclover |
04-21-2022 @ 5:21 PM
|
|
|
Member
Posts: 73
Joined: Aug 2021
|
Greetings Gents Sorry, I haven't been feeding results back to you. I did all the testing recommended, results didn't indicate any direct source of problem. I did notice the battery was very old, but tested good. Hard to believe it was purchased in Dec of 2005, so I replaced it. While working on this issue I noticed a crack in the coil housing. It runs from top to bottom of the coil. Could the coil be affected by heat and weaken the current to the starter motor? I also replaced the braided cables. I will keep you posted on the results of these changes
|
fortyford |
04-17-2022 @ 6:48 AM
|
|
|
Member
Posts: 218
Joined: Nov 2009
|
I agree with you Tom,it would be nice if the results were posted. https://www.ford-trucks.com/forums/1586932-slow-cranking-flathead-solved.html
|