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Thread: Vectra C CDTI 1.9 SOHC - Air in fuel line

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    Default Vectra C CDTI 1.9 SOHC - Air in fuel line

    Hi all... Just need to confirm my thinking on a fault I have with the Vectra.

    Fault : Fault developed late last week. Stopped at a service station and when tried to start up the engine, it coughed and spluttered and did not want to tick over. When the throttle was pressed to the floor it would not rev, until suddenly it did, after a few more revs the engine behaved normally. The rest of the journey - no problem.

    Next morning car would not start, called in AA who bled the fuel line by loosening off one of the feed pipes to one of the injectors. Engine then started and ran ok.

    Since then have had a mixture of easy starts, difficult starts and Bleeding starts. However the symptoms do not appear to be related to how long the engine is stopped or if the engine is cold or hot.

    Reading through threads : Looks like air is getting into the fuel line and the most common methods appear to be, air leaks around fuel filter, leaking fuel leak off pipes, or faulty injector seals.

    My thinking : As the severity of the symptoms is random, it is unlikely to be a simple air leak into the fuel line, which leaves the injector seals. When the engine is switched off the fuel in the line falls, but depending on the position of the engine when it stops could mean that the cylinder side of the injector could be under pressure or not. If it is under pressure a lot of air gets into the system, if not under pressure, no air gets into system.

    Does my thinking make sense, or should I try something else before I change the injectors?

    Thanks in advance ..... Paul

  2. #2
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    Vehicle : Vectra 3.2 V6

    Trim : GSI

    Engine : Z32SE

    Year : 2004

    Mileage : 77500

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    This is a long time ago now, but did you find the problem. Mine is doing the same thing.




    Quote Originally Posted by paul.adams10 View Post
    Hi all... Just need to confirm my thinking on a fault I have with the Vectra.

    Fault : Fault developed late last week. Stopped at a service station and when tried to start up the engine, it coughed and spluttered and did not want to tick over. When the throttle was pressed to the floor it would not rev, until suddenly it did, after a few more revs the engine behaved normally. The rest of the journey - no problem.

    Next morning car would not start, called in AA who bled the fuel line by loosening off one of the feed pipes to one of the injectors. Engine then started and ran ok.

    Since then have had a mixture of easy starts, difficult starts and Bleeding starts. However the symptoms do not appear to be related to how long the engine is stopped or if the engine is cold or hot.

    Reading through threads : Looks like air is getting into the fuel line and the most common methods appear to be, air leaks around fuel filter, leaking fuel leak off pipes, or faulty injector seals.

    My thinking : As the severity of the symptoms is random, it is unlikely to be a simple air leak into the fuel line, which leaves the injector seals. When the engine is switched off the fuel in the line falls, but depending on the position of the engine when it stops could mean that the cylinder side of the injector could be under pressure or not. If it is under pressure a lot of air gets into the system, if not under pressure, no air gets into system.

    Does my thinking make sense, or should I try something else before I change the injectors?

    Thanks in advance ..... Paul

  3. #3
    Regular Member Chunklamb's Avatar
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    Vehicle : 330D (13) Tourer 258 Auto & Signum 1.9 CDTI (07) 150 Auto

    Trim : M Sport and Design

    Engine : Z19DTH

    Year : 2007

    Mileage : 38100

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    I'd look at the seal to the fuel filter first... that can let air in

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