weak spark

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08-31-2015, 08:35 AM

Hardlanding

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weak spark

I am getting very weak spark on numbers 6 & 7 along with a very rough idle...any ideas what could be the problem? I switched out the cap rotor wires and plugs?

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08-31-2015, 07:10 PM

88XLTLariat

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Make, model, engine size? My guess would be your coil is on its way out.

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08-31-2015, 10:42 PM

Willz74

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Mine had a good coil but a loose plug wire on it put a big crater in the tip leading to the issue your having

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09-01-2015, 07:41 AM

Hardlanding

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1993 super duty with a 460, I changed the wires out...

if it is the coil, I don't understand is why just 6 & 7?

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