🔵 © ISUMO® Description • Controls and stabilizes fuel pressure delivered to the injectors • Maintains correct fuel pressure under idle, acceleration, and load • Prevents lean conditions, hard starting, and misfires caused by pressure drop • Built with corrosion‑resistant housing for long‑term reliability • Direct‑fit replacement for worn or unstable factory regulators

🔵 © ISUMO® Functions • Regulates fuel pressure inside the fuel rail • Ensures consistent injector spray pattern • Supports proper air‑fuel ratio for smooth combustion • Helps ECM maintain correct fuel trims • Prevents excessive pressure that can damage injectors

🔵 © ISUMO® Error Codes • P0089 – Fuel Pressure Regulator Performance • P0090 – Fuel Pressure Regulator Control Circuit • P0190 – Fuel Rail Pressure Sensor Circuit • P0191 – Fuel Rail Pressure Range/Performance • P0192 – Fuel Rail Pressure Sensor Low Input • P0193 – Fuel Rail Pressure Sensor High Input • P0171 / P0174 – System Too Lean • P0300–P0306 – Random or cylinder‑specific misfire

🔵 © ISUMO® Symptoms of Failure • Hard starting or long crank • Rough idle or hesitation • Poor acceleration • Lean fuel mixture codes • Misfires under load • Fuel smell or inconsistent pressure • Check Engine Light on

🔵 © ISUMO® Benefits of Replacement • Restores correct fuel pressure • Improves throttle response and engine performance • Eliminates lean conditions and misfires • Ensures stable fuel delivery across all RPM ranges • Protects injectors and fuel pump from pressure stress

🔵 © ISUMO® Package Includes • 1 × Fuel Injection Pressure Regulator • OE‑style sealing components (if included) • Ready‑to‑install replacement unit

🔵 © ISUMO® Important Notes • Inspect fuel lines and rail for leaks • Replace damaged O‑rings or seals • Clear stored codes after installation • Professional installation recommended

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