If the tach is really jumpy, that usually means an open in a plug wire. The energy that would normally go to the plug to fire it has nowhere else to go but to dump energy back into the ignition coil. This pent up energy ends up making the tach needle jump up during a miss.
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"I came into this world kicking, screaming,and covered in someone else's blood, I have no problem leaving the same way!"
ÔÇ£If you carry a gun, people will call you paranoid. ThatÔÇÖs ridiculous. If I have a gun, what in the hell do I have to be paranoid about?ÔÇØ -Clint Smith, Thunder Ranch.
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