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Thread: 1.9 problem

  1. #1
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    Default 1.9 problem

    hey guys just noticted when my engine is cold ani i start
    the car after about 5seconds the engine seems to make a shudder 4 about 2 seconds then returns 2 normal idol

    any ideas what the problem is. its a 1.9cdti 150

    thanks

  2. #2
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    there is a TSB for it

    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.
    Last edited by converted chris; 5th May 2009 at 23:54.

  3. #3
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    Default

    hope that helps

  4. #4
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    Default

    yeah tried a meter on the battery and the voltage is reading 12.2 so the battrey could be done..

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