2012 XF 5.0 low fuel pressure

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Dec 28, 2025 | 05:38 PM

Mercedez84black

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Joined: Dec 2025

Posts: 5

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From: Fl

2012 XF 5.0 low fuel pressure

Got bank1 low fuel pressure dtc. Ran torque pro and idle was 600rpm @ 49psi/ under load up to 3000rpm not much increase in fuel pressure, but ran better than idle...sluggish, hesitation, ran like misfiring, hesitation starting

Jan 2, 2026 | 12:57 AM

kansanbrit

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Joined: Dec 2013

Posts: 978

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From: Kansas

Fuel pressure on the 5.0 should be around 1500 PSI at the rail, that's why they are strong stainless steel. You are just measuring the low pressure pump output.