Field Remedy: 2056
| Subject: |
Engine Z19DT/L/H/J - Rough idle after cold
start |
| Models: |
Engines: |
Option: |
| Vectra-C 2004...,Signum 2004...,Zafira-B
2005...,Astra-H 2004... |
Z19DTL| Z19DT| Z19DTH,Z19DTL| Z19DT|
Z19DTH,Z19DTL| Z19DT| Z19DTH,Z19DT| Z19DTJ| Z19DTH| Z19DTL |
|
| Complaint: |
Bad idle behaviour after cold start at low
ambient temperatures. |
| Cause: |
At low ambient temperatures a low battery
voltage ( <*1*> Due to low voltage the real injection
quantity might not follow exactly the desired injection quantity.
As soon as the battery voltage exceeds the values of 12 Volt or as
the engine warms up (lower injection quantity) the idle speed
quality will improve. Low voltage is caused by load response
behaviour of the alternator, e.g. alternator need 1200 1/min
initially in order to "start working". Once the engine was started
and reved up > 1200 1/min the idle speed will stabilize w/o any
cut offs. Problem might be reinforced as more electrical devices
(auxiliary heater) are equipped to the system. |
| Production: |
|
Remedy:
In case of customer complaint please explain situation to the
customer.
Please note: There is no need to change any parts.
| FunctionalGroup: |
J - Engine |
| Complaint Group: |
21 - Poor Startability |
| Trouble Code: |
None |
|
