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power loss under load

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Old May 7, 2019 | 8:28 PM
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AllanMJohnson's Avatar
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Default power loss under load

1977 chev end,ran fine one minute,next minute missed and low power at load,no smoke no noise,runs smooth in park at 200 rpm,pulled for plugs,black sout on em,didnt pull the other 4,sound like weak wires?
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Old May 8, 2019 | 7:42 PM
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why is your idle 200? could be a timing issue. see if your distributor is loose and verify your timing with a timing light
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