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Mag, it sounds like you have some good & sound advise above. I will just add a little more.
When I suspect a "poor" or "no" spark condition I usually just take an old (known good) spark plug & open the electrode gap to 3/16" using a 3/16" drill bit as a gap gauge. Then install that plug in the offending cylinder's plug wire & lay it on the cyl head or block metal.. Then I crank the engine over with the ign switch turned on.. If the spark is a bluish color & constant on every firing the spark from the coil & wires is probably good to go,, if the spark is red, yellow or intermittent you have ignition woes..
Now on all the mis-firing you have been experiencing! Be sure to change your engine oil & filter as more than likely you have had a measurable amount of un-burnt fuel work it's way past your piston rings on that mis-firing cylinder & that can get expensive if it diluted your engine oil to the point of not protecting the enginebearings any longer under sustained load..
JDC
Mag, it sounds like you have some good & sound advise above. I will just add a little more.
When I suspect a "poor" or "no" spark condition I usually just take an old (known good) spark plug & open the electrode gap to 3/16" using a 3/16" drill bit as a gap gauge. Then install that plug in the offending cylinder's plug wire & lay it on the cyl head or block metal.. Then I crank the engine over with the ign switch turned on.. If the spark is a bluish color & constant on every firing the spark from the coil & wires is probably good to go,, if the spark is red, yellow or intermittent you have ignition woes..
Now on all the mis-firing you have been experiencing! Be sure to change your engine oil & filter as more than likely you have had a measurable amount of un-burnt fuel work it's way past your piston rings on that mis-firing cylinder & that can get expensive if it diluted your engine oil to the point of not protecting the enginebearings any longer under sustained load..
JDC
