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Old 08-14-2022, 04:08 PM   #10
billr
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Join Date: Jul 2013
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Default Re: 98 SC2 P171-Fuel trim System Lean, help fix Please!

You could disconnect/remove the fuel filter/reg and connect the gauge directly to the line from the pump; testing the pump without any effects from the filter/reg. Use hose and clamps to make temporary connection of the gauge, but be aware pressure will get up towards 100 psi if the pump is OK.
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