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Slight Missfire?

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Old Jun 27, 2010 | 01:12 PM
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Default Slight Missfire?

Guys, I have a rebuilt 327 only as of 2 years ago, all new plugs, wires, edelbrock 600 carb. The dist is a Summit 850001 HEI with a tach drive. It ran fine till this year and I now notice a slight mis when cruising at a steady speed. It is not steady , it seems to be random misfire. I ran my hands down each plug wire to see if I might have a bad wire or arching but found nothing. Pulled the pugs and all look perfect. Could the electronics inside the dist be causing the problem? Is there a way to check it? Can it be replaced or do I need an entire dist assembly?
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Old Jun 27, 2010 | 02:57 PM
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How old is the Cap/Rotor? Cracks or carbon tracks could cause what you are describing. Could be time for new ones....
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Old Jun 27, 2010 | 03:02 PM
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Originally Posted by pws69
How old is the Cap/Rotor? Cracks or carbon tracks could cause what you are describing. Could be time for new ones....
The entire dist is 2 years old with about 1,000 miles at most. There diesn't appear to be any cracks or sign of damage...
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Old Jul 3, 2010 | 08:49 AM
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Default Misfire

Try disconnecting the vacuum advance. If it goes away you will need an adjustable unit.
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