How to Fixed Engine Hard Starting?

These is the case I encountered today.the problem occurs due to pressure control valve clogging, with foreign materials.

How to Fixed Engine Hard Starting?

Model: Hyundai Santa Fe (SM)

Year Model: 2004

Displacement: 2000CC

Fuel: Diesel 

T/A: Auto

Subject: Engine Hard Starting – Pressure Control Valve.

1) Condition

1. Hard starting of CRDI diesel engine.

2) Cause.

1. Foreign material in the fuel pressure control valve.

3) Diagnosis

1. Scan tool check.
   = Diagnostic Trouble Code (No Trouble Code)
   = Inspect current data: Rail pressure is abnormal.
2. Inspect high pressure pump.
   = Separate the high pressure pipe that connects with common rail.
   = Detach the rail pressure from common rail.
   = Connect the separated high pressure pipe to rail pressure sensor.
   = Crank engine and check the fuel pressure: 1480 bar (Normal)
   
   Standard Value: 1500 bar
   
3. Inspect the injector.
   = Detach the high pressure pipe that is connected from common rail to injector.
   = Inspect the vacuum leakage (#1~#4) using hand vacuum pump: Normal.
4. Inspect the rail pressure control valve.
   = Remove the rail pressure control valve from common rail
   = Inspect the vacuum leakage using hand vacuum pump.
   = Foreign material is found inside the common rail.

4) Repair Guides

1. Replace the fuel pressure control valve.

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