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International Automotive Technicians Network
Re: Lean codes P0171/P0174
Posted to Technical Discussion Forum on 11/14/2024 8 Replies

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Hi Jack,

One way to check fuel delivery is to find a long straight road, preferably slightly uphill. Floor it from 40 to about 80 mph. If the vehicle has full power and fuel trims stay OK, most lik... Login to read more.

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