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EFV-8 Club Forum / General Ford Discussion / Flathead Starts,Runs and Shuts Off

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Discussion Topic: Flathead Starts,Runs and Shuts Off -- page: 1 2

oldflat40

12-11-2016 @ 6:07 AM

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59 AB Flathead starts and will run for 10-15 minutes. Will not have spark when you attempt to restart. If you wait a day and do nothing to it, it will fire up and run again for 10-15 mins.

carcrazy

12-11-2016 @ 7:13 AM

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Your coil is shot, replace it with a new one.

trjford8

12-11-2016 @ 7:26 AM

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Symptoms of a bad coil or a bad ballast resistor

This message was edited by trjford8 on 12-11-16 @ 7:28 AM

oldflat40

12-11-2016 @ 1:29 PM

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We have two new coils. We have changed them each time the motor shuts down. When the other one is put in there is no spark coming from the large coil wire that goes to the distributor (secondary). We leave it alone and it will fire up the next day on the first attempt. It will run for 10-15 mins and shut down.

cliftford

12-11-2016 @ 3:42 PM

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The next time this happens, run a jumper wire between the battery and the batt side of coil. If it starts, you have a problem between these two points, maybe the resistor. If not, you have a problem with the coil, distributor, condenser, or related part. Somewhere there is a poor connection that gets hot and goes open.

Greg58

12-11-2016 @ 4:01 PM

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That sounds like a condenser problem, it may not be charging up when it gets hot.

Greg

This message was edited by Greg58 on 12-12-16 @ 3:42 PM

oldflat40

12-12-2016 @ 4:12 AM

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We have the battery grounded to the block. A lead wire from the battery to the coil. A lead wire from the coil to the condenser and main coil wire to the distributor. Once the motor shuts down we check for spark and there is none. We change the coil and no spark. We have also changed the condenser and no spark. When hooked to the battery there is juice coming off the coil where the two leads are connected but not the main wire (secondary). If we wait, usally overnight. it will fire right up, run 10-15 mins and shut down and have no spark. The battery tests at spec after it runs. The coil(s) test in the specs also. When it runs it rns great and idles with no problem. We have checked and there is no problem with the fuel. Thanks for any helpyou can give as we are stumped!!!

cliftford

12-12-2016 @ 4:41 AM

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How about the distributor? At this point I would remove it and make sure the points and all connections are good. Also look inside the distributor cap and rotor for any defects. No offence, but you've overlooked something. We have all done this at one time or another.

oldflat40

12-12-2016 @ 4:45 AM

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This is the clamsh*ll type distributor. The only visible thing is that the metal tabs inside the cap look to have small grooves in them where the rotor may have rubbed them at on time.

trjford8

12-12-2016 @ 6:51 AM

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When the motor shuts down use a jumper wire and bypass the resistor. If it starts and runs you have found the problem.

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