Spark question

2939 Views 6 Replies 3 Participants Last post by prwttsh, Mar 22, 2012

prwttsh

Discussion Starter · Mar 20, 2012

Got the old 560 fired up today after it setting for a couple years. Checked points(cleaned), wires, and so on. After it started it had a bad miss. Started pulling plug wires. Cyl 2 and 5 weren't firing right. Replaced the 2 plugs and it straightened out. So now the big question,......... when you pull the plug wire off just a short distance, enough to get it to arc on a missfiring plug, and the engine smooths out, .....put it back on the plug and it misses again........ can someone explain why

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prwttsh

Discussion Starter · #3 · Mar 20, 2012

Peacher79 said:
I'll give you my 2 cents. The coil will only put out what is asked of it. When you pull the plug wire off, you are making the the coil work harder. It produces more a intense spark.

So if I understand this, the stronger spark forces it way through whatever is shorting the plug out? (plugs were clean so it had to been something inside the plug)