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Porsche > 993 (911) (1994-1998) > 993 (911) RS 1994-97 > Engine Rebuild Parts > Fuel System Parts > Fuel Lines & Breather Hoses >

Fuel Line For Warm Up Valve. Porsche 911 1972-76  ❭  91111009701

Fuel Line For Warm Up Valve. Porsche 911 1972-76 - 91111009701, 91111009700
4
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Product Information
Fuel Line For Warm Up Valve.

The Fuel Line for Warm Up Valve is a fuel line designed for classic air-cooled Porsche 911 models equipped with Bosch CIS / K-Jetronic mechanical fuel injection. This line connects to the warm-up valve / warm-up regulator and plays an essential role in maintaining correct fuel routing and pressure control during cold starts and engine warm-up.

Fits:

  • Porsche 911 T-K 1972-1973 2.4L LWB (F)
  • Porsche 911 1974-1976 2.7L / 1976 3.0 Carrera

Fits On To Diagram Ref No 28

In CIS fuel systems, the warm-up regulator helps manage control pressure so the engine can start cleanly when cold and transition smoothly to normal running conditions as temperatures rise. A properly functioning fuel line is critical to ensure stable pressure and leak-free operation. Over time, original fuel lines can degrade from age, heat exposure, and vibration, leading to cracking, seepage, or weakened fittings.

What This Product Does:
  • Carries fuel to/from the warm-up valve / warm-up regulator
  • Helps regulate control pressure in CIS injection systems
  • Supports smooth cold start operation and warm running performance
  • Ensures fuel is delivered through the correct metering path
  • Maintains leak-free

Symptoms Of A Failing Fuel Line:
  • Fuel smell in the engine bay
  • Visible fuel seepage or dampness around fittings
  • Cracked or aged line material (especially on older CIS cars)
  • Hard starting or poor cold running (if pressure is affected)
  • Rough idle during warm-up
  • Potential fuel leaks creating a fire risk

Why Replacement Matters:
  • Prevents dangerous fuel leaks in the engine bay
  • Maintains correct CIS fuel pressure regulation for proper drivability
  • Supports reliable cold starts and smoother warm-up operation
  • Helps avoid engine running issues caused by pressure loss
  • Preserves safety in classic Porsche maintenance



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