My new motor,1000miles has a fouled plug.I checked resistance of wire (Taylor)to that cylinder-around 15Kohms. Would I get a hotter spark going to a non-resistance wire? Thanks for the help! Bill
Avoid using solid plug wires.They cause too much magnetic field pulsing.Even race-cars don't use them anymore.Your dirty plug should be suffering from a different problem.Let me guess,must be a GM with that tiny O-ring valve stem oil seal?
Hi Paulo, Thanks for the input- yup SBC, Vortec heads, I think they have an improved seal, don't they? I don't get a lot of smoke from the bad bank on start-up or long idle, so I'm guessing rings haven't seated? Bill
OK.Yes the modern Vortech does use much better seals ,fixed to the guides.
But lets see,it is definitely a problem isolated to that one cylinder only.You could even try swapping wires but I do not think it is the guilty part.Swapping plugs... If it is a multi point injection fuel system,you could have a bad injector.If it is TBI equipped or carbureted,it would more likely be a mechanical problem.How about checking the manifold port of that cylinder sucking for instance,ATF up the tranny tubing?
Thanks for the thoughts,Paulo. I thought of the ATF- line to intake looks bone dry. Carburated, I keep changing plugs to keep the cylinder firing-#8 is the culprit. #6 a little dark and crusted, but fires. The rest are light brown. I don't know if 15K ohms is normal or not- thanks, Bill
Doc, another question for the pro- if I run shorter wires, i.e. over the cover rather than up from underneath, will the spark be hotter? Thanks again, Bill
Wider gaps make it a bit harder for a spark to jump with a weak spark..close them down about 5...from standard.
Doc imp:
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