Re: SPARK PROBLEMS, I dare you to explain this one!
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Posted by farmboy on June 20, 1998 at 20:08:36:
In Reply to: SPARK PROBLEMS, I dare you to explain this one! posted by Joe Brown on June 20, 1998 at 18:45:06:
: Farmall Cub 48. New coil in mag,condenser, points,cap,rotor,wires,plugs and carb, timed on the money. This thing just keeps running rough. I pulled the wire from the coil while it was running to look at the spark. If I pull the wire out till I have a 1/2" spark jumping from the coil to the wire the engine runs smooth as silk. If I move the wire into the coil and make connection it runs rough again. I tried widening the spark gap but this didn't help. I've been told I need to add a resistor on my plugs. Can anyone back this up and or explain to me whats happening. Thanks in advance. Joe, I don't claim to be real smart, but I have seen the same thing happen on a cylinder that had a fouled plug. By holding the plug wire a 1/2 inch or so from the plug, and letting the spark jump, it will make the plug fire. I have been told ( but I don't know if this explaination has any merit ), that the reason for this is that when the spark jumps it creates a hotter spark at the plug.
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