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Thread: z19dth high consumption

  1. #1
    Regular Member tox's Avatar
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    Vehicle InfoStats

    Vehicle : Vectra

    Trim : C

    Engine : Z19DT

    Year : 2005

    Default z19dth high consumption

    Hello

    I've experiencing a problem with my z19dth engine since this winter, in the fact that overall consumption compared to the last 3 winters has increased from 10-11 liters at 100km to 15-17 liters at 100 km which is unacceptable

    No fault codes present, but i noticed some weird readings using OPCOM:

    The difference from the ECU pressure command,. the ECU commands lets say 150 kPa boost and the turbo responds wtih 120 kPa, almost everytime there is a difference about 20-15 kPa.

    Also, i noticed a difference from the calculated air flow in the MAF, almost everytime the calculated air flow is less with 5kg/h air than the airflow which the MAF reads

    If you need, i can post the real time record with measurings from OPCOM

    Also, the car doesn't feel much alive like it used to be.

    Thank you

  2. #2
    Regular Member tosh23's Avatar
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    My car is a thirsty beast, 33mpg at moment...1.9 cdti 120. 2007

    Ive been looking at "other symptoms" and came across this...
    http://www.vectra-c.com/forum/showthread.php?t=156342

    It might help......Tosh

  3. #3
    Regular Member tox's Avatar
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    Vehicle : Vectra

    Trim : C

    Engine : Z19DT

    Year : 2005

    Default

    THank you, i'll check the temp sensor The thing is, at the gauge it shows ok, engine seems around 85 degrees C when normal condition even at -20 gr C (surely, it will go at 80-85 C after 30 mins of driving ) )

    AFAIK, when i had a Calibra, there were 2 sensors, one for the ECU to know the engine tmp and one for the gauge. Maybe this sensor is 2 in 1 sensor, one for ECU and one for gauge. maybe the ecu one reports fake...

  4. #4
    Regular Member tosh23's Avatar
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    Your gauge works fine, it might be the temp sensor to the ecu so that you are running on choke. Vauxhall will be getting my new sensor on Thursday so I will report back..

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