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International Automotive Technicians Network
Re: P0171/P0174
Posted to Technical Discussion Forum on 5/7/2013 1 Reply

Trims are adding fuel at idle, okay at speed. Load at 99 % at speed. So I would say good MAF. MAP at idle is low. I would look for a vacuum leak. Don't have much experience with this engine for repetitive failure, so I would visually check for hoses cracked/of... Login to read more.

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