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rotorwrench · 03-14-2022, 06:41 PM

A person needs a dedicated capacitor tester to fully test one. A person can test with a digital oscilloscope set up while running but would have to have a set up that works with a lap top to get that function.

The 8BA carbs usually have the "8BA" casting marks on the body. They use venturi vacuum to function the spark advance/retard control. There is no centrifugal advance on this system. It's all vacuum operated. It's a good idea to test the vacuum can too.

As someone mentioned, the idle fuel circuit is likely blocked or there is a hell of a vacuum leak somewhere.

03-14-2022, 06:41 PM	#19
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,509	Re: Holley 94 on 8ba barely runs A person needs a dedicated capacitor tester to fully test one. A person can test with a digital oscilloscope set up while running but would have to have a set up that works with a lap top to get that function. The 8BA carbs usually have the "8BA" casting marks on the body. They use venturi vacuum to function the spark advance/retard control. There is no centrifugal advance on this system. It's all vacuum operated. It's a good idea to test the vacuum can too. As someone mentioned, the idle fuel circuit is likely blocked or there is a hell of a vacuum leak somewhere.