Strong blue spark don't mean chit!!! Its mandatory you use a GM HEI spark tester are equivalent its the LAW!!!...
If the coil has white dust on the side trash it and replace it with a new coil. AC Delco caps/rotors only from the dealer not a Denso that describes it as a OEM manufacture AC Delco ONLY!!!
So far you have gave great info your spark is still suspect till you eliminate it with a spark tester for the application... That holds true for all ignition systems GM is the worst of the bunch get a spark tester confirm proper spark life will be good...
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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