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Left side running rich

Engine

Vehicle Information: Year: 1980; Body Type: Coupe;

My '80 SC has a 40IDA-3C Weber conversion and SSI heat exchangers. At idle the left side of the engine tends to run rich and the plugs get sooty. I have checked the float levels per the 101 Projects manual and balanced the air flow to all six cylinders. The fuel pressure is at 3 PSI. Could I have a leaky needle valve that is causing the flooding? Thanks - Jim B

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