Fuel Line Mixture Control to Warm-Up Regulator. Porsche 911 SC 1978-80  ❭  93011050201

Fuel Line – Mixture Control to Warm-Up Regulator 

High-quality replacement fuel line designed for Porsche 911 SC 1978-80 models equipped with Bosch 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 1978-1980 3.0L / SC

Diagram ref no 51

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 SC 
• 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 K-Jetronic Fuel & Control Pressure System

This line operates within the   K-Jetronic  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 K-Jetronic 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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93011050201

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