Chasing a miss fire, hoping for help diagnosing from plugs.
Looking for help chasing a miss fire. Pulled these plugs this morning after letting the engine cool over night, things to note about the plugs:
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#5 was wet with fuel l, but not blackened with soot
#7 & #8 are both blackened with soot, so I can only assume they aren't firing properly.
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I have come to find out that all the plugs are using an "anti fouling spacer", not sure that is helping or hurting anything. The plug wires are old, so they could probably use a replacement.
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Where would you start with diagnosing? These are new (less than 100 miles) plugs on an engine that sat for years (20+). There isn't any obvious oil being burnt coming out of the exhaust. I find it off that the front plugs seem to be fine, it's just the rear plugs that are having issues.