Quote:
Originally Posted by Marc
I have to say. I checked three spark plugs before I replaced the parts. I saw what I thought was good spark, but evidently not the case. So I have learned that sight it not the appropriate test for spark.
But what is? If you can see spark but don't know if it is strong enough, how do you test for that?
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Buy a spark tester. It's a little tool that clips on the engine and has a spot to connect the spark plug lead. The head is typically adjustable with a graduated marking between the electrodes. A GOOD automotive ignition system should be able to generate 25-30KV easily.
The rough running could just be fouled spark plugs from running with weak spark. Was it running rough before you had all these starting problems?