Posted by Bob on March 26, 2011 at 15:33:25 from (64.255.159.192):
In Reply to: H firing problem posted by pintobill on March 26, 2011 at 15:22:12:
You have bad (open) sparkplug wires OR the rotor is not quite where it's supposed to be when the coil fires. Either situation will cause the spark to seek an easier path to ground than the sparkplugs, tearing up the cap and rotor on the way.
The rotor needs to be physically near a high-tension terminal when the coil fires. This can be determined by using a cap with a hole cut in it and then running the engine in a dark area and watching the spark jump from the tip of the rotor to each terminal. I have seen custom ignition setups with problems (a misplaced pickup coil) that sparked when the rotor was almost in between neighboring high-tension terminals.
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