| swmddo | -- 09-03-2012 @ 7:30 AM |
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Hey again...my '48 starts great, but once "hot", it won't start. It cranks, but doesn't seem to get a spark. If the capacitor is bad, can you check it with a 9-volt small battery, and then see how long it takes to discharge? For the one I currently have, the discharge is fast and steady. I've had the points checked, and I've had several coils. Just trying now to isolate a frustrating problem. Steve
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| TomO | -- 09-03-2012 @ 9:10 AM |
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Steve, It has been my experience that no spark situations when the engine is warm is due to a bad coil. When the condenser is bad, it affect the spark cold or hot. The only exception to this is when I got a condenser with a cold soldered joint on the ground tab. Check your spark with the coil cold. If it is weak (less than 1/2" and orange in color) the coil is bad. I have a coil tester made by SnapOn that checks the coil cold and hot. I find that a lot of the "new" coils fail the hot test. This applies to the original Ford type and the modern round ones. Have either Skip Haney or Jake Fleming rebuild an original type coil for you and then you should be done with coil problems. Tom
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| swmddo | -- 09-03-2012 @ 9:22 AM |
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Thanks, Tom.
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| supereal | -- 09-03-2012 @ 10:33 AM |
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You can quickly check a condenser with an ohmmeter. Put meter on high ohms, and place the probes across the condenser. Then switch the probes and watch the needle. If it jumps, it is likely the condenser is working. If it doesn't, the condenser is open. If the needle stays up, it is shorted. Finding the terminal loose isn't rare, either. Use an analog meter. Good, cheap ones are readily available, and should be in your "road kit". Checking a coil isn't that easy. The best way is to substiture a known good one. Like Tom, I have found new coils that are weak.
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