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engine running lean


Model: 911, Year:1975, Mileage: 0, Type of use:Street use only
I'm thinking about purchasing a 1975 911. There is one reason I'm concerning: 1)The engine is a 3.0 with 0 mile (rebuilt) and 170 k miles frame (1975). However, it running too rich thus it's burning some oil out the exhaust when of the gas pedal. How much work is required to tuned this engine?

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