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Old 04-19-2018, 09:13 PM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
Simply ohm the tip to electrode to make sure it is not a R plug.

Best F8DC4 replacement for 104 Waste Spark Ign [ DIS] systems is NGK BCP6ES.

Copper core/non resistor.

90% of fouled plugs/skips/misfires on 104 waste spark systems is caused by the Resistor boots on top of the plug, not the plug . Good idea to change these 3 boots whenever changing the plugs on 104's ................
A Dalton

Last edited by Arthur Dalton; 04-19-2018 at 09:40 PM.
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