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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Pressure Valves / Sensors / Dampers / Regulators

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PM-O404-0
Product Information
Product Information
Fuel pressure control unit with AN-6 hose fittings. 


pmo

Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

Fuel Pressure Control Unit, AN-6 Hose Fittings

A PMO exclusive, this pressure control unit eliminates the need to change fuel pumps when converting MFI and CIS Injected Systems and indicates the fuel pressure the system is running at. The unit is connected to the feed and return circuits and the fuel pressure is controlled by restricting the flow back to the tank. The flow back to the tank is controlled by the adjustable pressure valve.

This unit is preset with a running pressure of 3.0 to 4.0lbs of fuel pressure

Special Order item
99311021700
Product Information
Product Information
Fuel Pressure Valve.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 993 1995-98
Porsche 996 C2/C4/C4S 1998-05
Porsche 996 Turbo 2000-05
Porsche 996 GT3 2000-05
Porsche 997 C2/C2S/C4/C4S 2005-08
Porsche 997 GT3 2010-11

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Diagram ref no 6

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99311021700
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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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