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Pressure Valves / Sensors / Dampers / Regulators

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9A790605430
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Product Information
Fuel Pressure Sensor.
Maintain precise fuel system operation and optimum engine performance with this Genuine Porsche Fuel Pressure Sensor. Manufactured to Porsche's exact factory specifications, this high-precision sensor continuously monitors fuel rail pressure and supplies real-time data to the engine control unit (ECU). This enables accurate control of fuel injection, ensuring efficient combustion, smooth engine operation, improved fuel economy, and reduced exhaust emissions. Built to withstand the high pressures and demanding temperatures of modern direct injection fuel systems, this genuine sensor delivers the reliability and durability expected from Porsche.

Fits:
  • Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

Diagram Ref No 4

The fuel pressure sensor is a vital component of the engine management system, measuring the pressure within the fuel rail and allowing the ECU to adjust injection timing and fuel delivery according to engine load and operating conditions. Manufactured using premium electronic components within a robust, fuel-resistant housing, it provides accurate readings throughout its service life and is ideal for routine servicing, diagnostics, repairs, and restoration projects.  

What This Product Does:
  • Monitors fuel rail pressure in real time.
  • Sends accurate pressure data to the engine control unit.
  • Supports precise fuel injection control.
  • Optimises combustion efficiency and engine performance.
  • Helps improve fuel economy and reduce exhaust emissions.
  • Replaces faulty or inaccurate fuel pressure sensors.
  • Provides a genuine Porsche fit for straightforward installation.

Symptoms Of Wear Or Failure:
  • Engine management warning light illuminated.
  • Difficulty starting the engine.
  • Rough idle or engine hesitation.
  • Reduced engine performance or acceleration.
  • Increased fuel consumption.
  • Poor throttle response.
  • Engine stalling or intermittent running.
  • Diagnostic fault codes relating to fuel pressure or the fuel rail pressure sensor.
  • Vehicle entering limp-home mode.

Why Replacement Matters:

  • The fuel pressure sensor is essential for maintaining accurate fuel delivery and efficient combustion. A faulty sensor can provide incorrect pressure readings to the ECU, leading to improper fuel injection, poor engine performance, difficult starting, increased fuel consumption, higher exhaust emissions, and activation of reduced-power or limp-home mode. Continued operation with an inaccurate sensor can place additional strain on the fuel injection system and related engine components.
  • Replacing a worn or faulty sensor with this Genuine Porsche Fuel Pressure Sensor restores accurate fuel pressure monitoring, improves engine performance, enhances fuel efficiency, and supports reliable long-term operation. Manufactured to Porsche's exacting standards, it delivers exceptional fit, precision, durability, and reliability for Porsche maintenance, repairs, and engine management servicing.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A790605430
9A790605430

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9A790605430/1
Product Information
Product Information
Fuel Pressure Sensor.
Maintain accurate fuel system operation and optimum engine performance with this Valeo Fuel Pressure Sensor. As an Original Equipment (OE) manufacturer, Valeo produces high-quality engine management components to Porsche's exacting standards, ensuring precise fuel pressure monitoring, dependable reliability, and long service life. Designed to continuously measure fuel rail pressure, this sensor provides the engine control unit (ECU) with accurate real-time data, allowing precise control of fuel injection for efficient combustion, improved fuel economy, and reduced emissions.

Fits:
  • Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

Diagram Ref No 4

The fuel pressure sensor is an essential part of the engine management system, monitoring pressure within the high-pressure fuel rail and transmitting this information to the ECU. The ECU uses these readings to regulate fuel injection timing and quantity according to engine load and operating conditions. Manufactured using premium electronic components within a robust, fuel-resistant, and heat-resistant housing, this Valeo sensor is engineered to perform reliably under the demanding conditions of modern direct injection fuel systems, making it ideal for routine servicing, diagnostics, and repairs.  

What This Product Does:
  • Monitors fuel rail pressure in real time.
  • Sends accurate pressure data to the engine control unit.
  • Supports precise fuel injection control.
  • Optimises combustion efficiency and engine performance.
  • Improves fuel economy and reduces exhaust emissions.
  • Replaces faulty or inaccurate fuel pressure sensors.
  • Provides an OE-quality fit for straightforward installation.

Symptoms Of Wear Or Failure:
  • Engine management warning light illuminated.
  • Difficulty starting the engine.
  • Rough idle or engine hesitation.
  • Reduced engine performance or acceleration.
  • Increased fuel consumption.
  • Poor throttle response.
  • Engine stalling or intermittent running.
  • Diagnostic fault codes relating to fuel pressure or the fuel rail pressure sensor.
  • Vehicle entering limp-home mode.

Why Replacement Matters:

  • The fuel pressure sensor is a critical component of the engine management system, providing the ECU with the accurate fuel pressure information required to control fuel injection precisely. A faulty sensor can lead to incorrect fuel delivery, difficult starting, rough engine operation, reduced performance, increased fuel consumption, higher emissions, and activation of reduced-power or limp-home mode. Continued operation with an inaccurate sensor may also place unnecessary strain on the high-pressure fuel system and related engine components.
  • Replacing a worn or faulty sensor with this Valeo Fuel Pressure Sensor restores accurate fuel pressure monitoring, improves engine performance, enhances fuel efficiency, and supports reliable long-term operation. Manufactured by Valeo to Original Equipment standards, this fuel pressure sensor delivers exceptional fit, precision, durability, and reliability for Porsche maintenance, repairs, and engine management servicing.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A790605430
9A790605430

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Pressure Valves / Sensors / Dampers / Regulators

Fuel Pressure Valves, Sensors, Dampers & Regulators – Consistent Fuel Flow for Porsche Performance

Fuel pressure valves, sensors, dampers, and regulators are critical components in your Porsche’s fuel system, ensuring stable fuel pressure and accurate fuel delivery under all driving conditions. Working together, these parts maintain the delicate balance between performance, efficiency, and emissions control that defines Porsche engineering.

At Design911, we offer a comprehensive range of  fuel pressure components — including regulators, dampers, pressure relief valves, and sensors — developed to deliver exceptional reliability and precise fitment for Porsche models across generations. Crafted from high-strength alloys, corrosion-resistant materials, and advanced electronics, our components ensure smooth operation and long service life, even under high heat and vibration.

Whether you’re maintaining a modern 992 or restoring a classic 911, these manufacturer-quality components are essential for achieving consistent fuel delivery and flawless performance.

What Do Fuel Pressure Valves, Sensors & Regulators Do?

These components ensure that the engine receives the correct fuel pressure to maintain stable combustion, power output, and throttle response.

Core Functions:

  • Fuel Pressure Regulator: Maintains steady pressure in the fuel rail to match engine demand.
  • Pressure Sensor: Monitors and relays fuel pressure data to the ECU for precise adjustments.
  • Fuel Damper: Smooths out fuel pulses and pressure fluctuations.
  • Pressure Valve: Prevents over-pressurisation, protecting the fuel system.

Together, they ensure smooth idling, responsive acceleration, and consistent power delivery — key for both performance and fuel economy.

Why Do Fuel Pressure Components Fail?

Due to constant exposure to heat, vibration, and fuel contaminants, these components can wear out over time, leading to erratic fuel pressure and performance issues.

Common Causes of Failure Include:

  • Clogging or contamination from dirty fuel or debris.
  • Internal diaphragm wear in regulators or dampers.
  • Corrosion from moisture or ethanol-based fuels.
  • Electrical failure in pressure sensors.
  • Vacuum leaks causing incorrect fuel pressure readings.

Symptoms of failure include rough idling, poor acceleration, stalling, fuel odours, or a check engine light indicating a pressure-related fault.

Why Replace the Fuel Pressure Components?

Replacing worn or malfunctioning fuel pressure components restores proper system regulation, improving performance, fuel efficiency, and drivability. Our precision-fit, manufacturer-quality replacements are built for accuracy and durability, ensuring long-term reliability.

Key Benefits:

  • Restores stable fuel pressure and consistent delivery.
  • Improves performance, acceleration, and throttle response.
  • Reduces fuel consumption and emissions.
  • Prevents damage to injectors and fuel pumps.
  • Crafted from corrosion-resistant, heat-tolerant materials.
  • Direct-fit compatibility for Porsche models of all eras.

Ideal for regular maintenance, rebuilds, and performance upgrades, these components ensure your Porsche operates with the precision it was designed for.

Highlights:

  • Comprehensive selection of Porsche fuel pressure regulators, valves, dampers, and sensors.
  • Precision-engineered for exact pressure control and reliability.
  • Durable construction for long service life.
  • Ensures stable fuel delivery and efficient combustion.
  • Perfect for performance tuning, restorations, or maintenance.
  • Compatible with classic and modern Porsche models

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