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Re: P0171,P0174 could use some direction
Posted to Technical Discussion Forum on 12/5/2023

Hi Samual,

Try adapting a vacuum gauge to the dipstick tube and see if it is pulling vacuum. The two places that are suspect is the PCV or possibly some debris got missed when the intake gaskets were done.

Also verify the bolt torque on the intake, I've se... Login to read more.