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Diagnostický případ

Opravené vozidlo
Karel Kédl
Karel Kédl
Jazyk případu:

Jeep Cherokee 2.8 CRD – Long cranking and slow fuel pressure buildup

25.05.2017 0 1523x

Informace o vozidle

VIN:
Výrobce: Jeep
Model: Cherokee
Rok výroby: 2004
Kód motoru: 2,8 CRD
Typ motoru: R2816K4
Výkon (kW): 109 kW
Převodovka: Automatická
Palivo: Diesel
Najeto: 180 000 km

Jak se závada projevuje

Nefunguje / funguje nesprávně. Regardless of the temperature it takes about 2 seconds before the engine cranks and after cranking the idle is fluctuating for a while.

Jak často se závada projevuje

  • Trvale přítomná závada.

V jakém systému se závada vyskytuje

  • Motoru.
  • neukládá žádný chybový kód

Doposud provedeno bez úspěchu

The fuel regulator valve was replaced. The high fuel pressure was verified by an oscilloscope. It is clear that the fuel pressure build up is slow and increases in steps. The return fuel from the injectors was measured. During cranking every injector flows about 1 ml within 5 seconds and one cylinder flows almost double the amount. Possible fuel delivery line air leak was bypassed by installing a seperate fuel vessel with gravity fuel feed. No change.

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