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Discussion Topic:
HOT COIL
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autoluke |
08-23-2018 @ 7:40 AM
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Member
Posts: 86
Joined: Jul 2017
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'41 ran like a watch for a while, before beginning to miss after a few miles. Crippled home to discover that the coil became VERY hot, and wonder if reversing the primary leads might help. Suggestions ?
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autoluke |
08-23-2018 @ 8:09 AM
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Member
Posts: 86
Joined: Jul 2017
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Found out that I need to send the coil to Haney.. His contact number ?
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TomO |
08-23-2018 @ 8:12 AM
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Senior
Posts: 7256
Joined: Oct 2009
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Do you have the original Ford type coil or an adapter using a modern coil? I am going to base my answer on the using a modern coil. Using a modern coil, the ignition resister under the dash should be bypassed. The wire from the ignition resister to the coil should go to the NEG or - terminal of the coil and the primary wire going to the condenser on the adapter should go to the POS or + terminal of the coil. If the coil is wired correctly and still gives a weak spark when hot, the coil is defective. Skip Haney website is: http://www.fordcollector.com/ Tom
This message was edited by TomO on 8-23-18 @ 8:15 AM
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autoluke |
08-24-2018 @ 3:55 AM
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Member
Posts: 86
Joined: Jul 2017
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Can not find a resistor of any kind in the circuit, and the hot wire from the switch is connected to the batt terminal of the coil. I have ordered a new coil from Macs , which is described as having an internal resistor. I'll mount this one and see what happens.
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40 Coupe |
08-24-2018 @ 5:16 AM
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Senior
Posts: 1679
Joined: Oct 2009
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6V or 12V ?? + or - ground?? Original coil mounted to the top of the distributor??? Coils do run hot. You will not go wrong having Skip rebuild an original coil, also ask him for a replacement condenser. the 41 ignition resistor is under the dash mounted high on the firewall above the steering column. Coils are polarity sensitive and will put out the proper high voltage only if connected properly, you can not reverse the voltage input to an original coil. I believe you should reconsider Mac's ignition parts.
This message was edited by 40 Coupe on 8-24-18 @ 5:21 AM
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autoluke |
08-24-2018 @ 6:01 AM
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Member
Posts: 86
Joined: Jul 2017
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Thanks to all for the info.. System is set up as a positive ground.. 6 volt. The coil is a replacement which is secured with a collar apart from the distributor. There are two shielded boxes located far above the steering column on the firewall. Larger one with several wires in and out. Small one I believe is the resistor , but has been bypassed with the two wires connected to the same terminal, rather than across the two connections provided . I have also contacted Skip, and will send the coil on hand.
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40 Coupe |
08-25-2018 @ 7:11 AM
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Senior
Posts: 1679
Joined: Oct 2009
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If Skip is going to rebuild your original Ford coil for 6V you will need the resistor, that has been jumpered, reconnected to the circuit. When you do that clean all the hardware going on the resistor. Also clean the hardware on the ignition switch. Inspect all the wires and look for any signs of overheating due to loose or dirty terminations. Remove the resistor 0.5 Ohm and clean the two ears. Reassemble and you should be ready for your rebuilt coil and new condenser. The larger metal box next to the resistor is the lighting circuit breaker.
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autoluke |
08-25-2018 @ 8:30 AM
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Member
Posts: 86
Joined: Jul 2017
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The coil I am sending to Skip appears to be a replacement, rather than an original. Case is exceptionally clean and reflective, with terminals marked "batt" and "dist" rather than + and - . Explained this to Skip , who said he will take it apart and call me with his opinion. In the meantime I plan to mount the Mac version with "batt" to ground, and leaving the resistor as is. I'll report my findings.
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TomO |
08-25-2018 @ 9:24 AM
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Senior
Posts: 7256
Joined: Oct 2009
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Rather than send your coil to Skip to be rebuilt, you can get a quality 6 volt positive ground coil at NAPA. The NAPA part number is ECH IC7. This is not a "fitzall" coil like Macs sells.
Tom
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autoluke |
08-26-2018 @ 2:44 AM
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Member
Posts: 86
Joined: Jul 2017
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Looks like I will take the roll as a test lab. I will try both the Mac and the NAPA..both with the resistor bypassed.
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