![]() So, even though the PAMCO and the 17-6903 coil have been tested with one plug disconnected, it is still not a good idea to do that. That is why the plug that is still connected to the coil continues to fire, but at a leaser strength. The telephone number for the Harbor Freight store in Murrieta (Store 445) is 1-95. ![]() Mondays through Saturdays, and from 9 a.m. Sometimes this short is from the secondary to the primary, so then the very high voltage exits the coil on the primary side, through the electronic ignition, to ground and then back to the other plug that is still connected to the coil.Ī well made coil, like the 17-6903, has better insulation material on the windings, so the voltage does not actually arc internally, but rather it finds a non destructive path through the capacitance of the windings. The Harbor Freight Tools store in Murrieta (Store 445) is located at 40516 Murrieta Hot Springs Road, Murrieta, CA 92563. This usually means that the voltage will arc through the insulaiton, leaving a carbon track that permanently shorts out the coil. So, if one plug is disconnected, the very high voltage in the secondary will find a path to complete its circuit. The secondary of a dual output coil is not internally grounded. Freight Tools at 1-80 as soon for every engine they build. Here is a video of a PAMCO driving a 17-6903 "Ultimate" coil with one plug disconnected. I have run tests with other coils, like the 17-6903 "Ultimate" coil with one spark plug wire disconnected with no damage to either the coil or the PAMCO. The coil then shorts out and fries the ignition system, regardless of whether it is a PAMCO or not. In the case of the Green Monster Coil, operating it for even one spark with a cap removed will fry the coil. Harbor Freight buys their top quality tools from the same factories that supply our competitors. ![]() In other words, its not the ignition system that may be damaged, but the coil. Due to the high secondary voltage, it is possible to damage the internal insulation of the secondary coil". "On no account run the engine with the sparking plug cap(s) removed. It's not just the PAMCO that should not be run with a plug disconnected.įrom page 150 of the Haynes manual in reference to the TCI ignition: ![]()
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