Volkswagen Golf Quiz
4- cylinder injection engine(1.4 1 direct inction. turbocharger)

Releasing high pressure in fuel system

In this manual: 4- cylinder injection engine(1.4 1 direct inction. turbocharger)
General body repairs, exterior — 230General body repairs, interior — 279General information, paint — 133Vechile- specific paint information — 27Heating, air conditioning — 156Auxiliary heater — 58Air conditioning system with refrigerant R134a — 1297- speed dual clutch gearbox 0CW — 544- cylinder injection engine(1.4 1 direct inction. turbocharger) — 182Fuel supply system - Petrol engines — 59Running gear, axles, steering — 221Brake system — 92Wheels and Tyres guide — 12Guide for using trailers — 11Wheels and Tyres Guide - General Information — 121Brake system (hybrid) — 73Electrical system — 326Communication — 65Electrical system, general information — 111
~1min read

The fuel system is under high pressure.Risk of injury due to fuel which may spurt out.Release high pressure.

Special tools and workshop equipment required

Vehicle diagnostic tester

Releasing high pressure in fuel system:

  • Connect vehicle diagnostic tester and then carry out the function “Reducing high fuel pressure” in “Guided functions”.

The fuel pressure will drop to the specified value.

  • Switch off ignition.
The fuel rail is still filled with fuel, but the fuel is not under high pressure anymore.
  • After the high pressure has been released, the high-pressure system must be opened »immediately«. To do this, wrap a clean cloth around the connection before opening it. Catch the escaping fuel.
Note If the high-pressure system is not opened immediately, the pressure will rise again due to reheating effects. Now the ignition must not be switched on anymore, because switching the ignition on would cause the pressure to rise again.

Concluding measures

  • Clear event memory and generate the readiness code in engine control unit using “Guided functions” mode.

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