Re: Spark Plugs

Posted by gusc on December 01, 2004 at 22:40:12 from (63.97.117.10):

In Reply to: Spark Plugs posted by PA Steve on December 01, 2004 at 12:52:44:

PA,
The plugs fire when you remove the leads or loosen the leads at the plug because you are increasing the resistance to the plug by making another gap at the lead terminal. This gap is just another form of resistance. Make sure you are using resistor plugs. Increasing the gaps to .035 would probably have made them work.

Plugs and leads must have enough resistance to delay the current flow for a short time to build up the voltage to make a strong spark. Low resistance lets the plug fire too soon with a low voltage weak spark. Works kind of like a condenser but different.

I used Champions for 50 years. Now I won't use them unless it is impossible to get something else, anything but Champions.

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