Checking fuel pressure regulating valve - N276-

Fuel pressure regulating valve - N276- (pressure control valve) is located on fuel rail.

Fuel pressure regulating valve - N276- (pressure control valve) only opens under cold starting conditions below a certain temperature.

Heated, regulated fuel is returned upstream of fuel filter.

This prevents fuel filter from clogging at low temperatures.

Fuel pressure regulating valve - N276- -5- is located on fuel rail.

• Remove engine cover panel ⇒ 3 Engine cover panel.

• Pull off fuel return line -1-.

• Use a dummy plug -1- to seal open return line connection.
• Connect fuel return line -2- to suitable hose -3-.

• Hold the end of this hose -1- in a suitable container -2- to measure the return flow rate.
• Start engine and run at idling speed.

• Specification 0 ml

If the specification is not attained, the fuel pressure regulating valve - N276- is defective. Renew ⇒ 5 Senders and sensors