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- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fuel Line – Mixture Control to Warm-Up Regulator
High-quality replacement fuel line designed for Porsche 911 1974 models equipped with Bosch CIS (K-Jetronic) fuel injection systems.
This line connects the mixture control unit (fuel
distributor) to the warm-up regulator (WUR), playing a critical role
in regulating control pressure within the fuel system. This pressure directly
influences fuel mixture during cold starts and warm-up phases, making this line
essential for proper engine behaviour and drivability.
Fits:
- Porsche 911 S 2.7L 1974-1977
Diagram ref no 62
Manufactured from a high-quality polyamide tube, this fuel line features reinforced polyamide fibres and an additional protective outer sheath, ensuring exceptional durability, pressure resistance, and long-term reliability in demanding engine bay conditions.
Built to OEM specifications, it offers precise fitment and is ideal for maintenance, repair, or full CIS system restoration.
Key Features
• Direct replacement fuel line (mixture control to WUR)
• Suitable for Porsche 911 (1974 – CIS models)
• Manufactured from high-quality reinforced polyamide
• Polyamide fibre reinforcement for strength
• Additional protective outer sheath
• Designed for precise control pressure delivery
• OEM-style fit and performance
Part of a Complete CIS Fuel & Control Pressure System
This line operates within the CIS control pressure circuit, which includes:
• Fuel distributor / mixture control unit
• Warm-up regulator (WUR)
• Fuel pressure lines
• Fuel accumulator
• Injector lines and injectors
Together, these components regulate fuel pressure and mixture, particularly during cold starts and engine warm-up.
Why This Line is Critical
The warm-up regulator relies on accurate pressure signals.
This hose helps to:
• Deliver control pressure from the fuel distributor
• Regulate air-fuel mixture during engine warm-up
• Ensure smooth cold starting and idle stability
• Maintain consistent engine performance
Why Replace CIS Control Pressure Lines
Over time, original lines can degrade or lose integrity.
Common issues include:
• Cracking or ageing of original materials
• Internal restriction affecting pressure regulation
• Fuel leaks under pressure
• Poor cold start performance or unstable idle
Replacing the line restores correct control pressure behaviour and system reliability.
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Fits:
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Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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Fits:
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Click 'Zoom in' for large parts diagram.
Diagram ref no 21
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Sold individually; x2 required per vehicle.
Fits:
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Diagram ref. 14.
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