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code po175 and po172 keeps coming up ive checked fuel line for leaks . the spark plugs have been changed . after resetting the check engine light it does not change how the truck runs. it idles rough at stop lights and its hard to start

Vehicle: 1997 Chevrolet cheyanne 350 vortec

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P0172 Fuel trim too rich (bank1)

P0175 Fuel trim too rich (bank2)

How the motor oil. Smell for raw fuel, if there is raw fuel the fuel pressure regulator may be leaking, So can the injecor lines.

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