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Thread: over boosting? diagnosed please help

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    Default over boosting? diagnosed please help

    had car diagnosed today due to engine management coming on when on bypasses

    diagnostics machine says its over boost

    the car has lost power and surges power at random times rather than smoothly

    can anyone tell me what is the cause of over boost

    cheers

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    [Ex]Admin Duncan's Avatar
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    Given your engine the first thing I'd be doing is checking thoroughly all the boost hoses for any splits. It's a common problem on the 2/0/2.2 DTi. A leak of boost would cause a spike in overboost.

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    Regular Member Gsi3.2's Avatar
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    also, remove and clean the boost sensor..it can get gunged up and give false readings back..

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    where is the bost sensor?

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    Regular Member craigbarlow18's Avatar
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    Quote Originally Posted by chowwie View Post
    where is the bost sensor?

    Good question ive wanted to know this too?

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    just found out i need to remove the engine cver to see it

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    follow the intake air hose from the intercooler to the alloy intake housing under the plastic cover on the front of the engine..the very first electronic sensor is the boost sensor..

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    Quote Originally Posted by Gsi3.2 View Post
    follow the intake air hose from the intercooler to the alloy intake housing under the plastic cover on the front of the engine..the very first electronic sensor is the boost sensor..

    cheers mate for the help

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    Default over boost continued

    i replaced the boost sensor with a brand new one
    so far engine management light not come on but still power loss
    as mentioned before the turbo does not seem to kick hard unless i hover around a sertain rev by holding pedal quater way then press and it flys?

    if i put foot to floor then it seems to flat spot all the way through rev range but all ok if i hover first?

    hope you understand because its hard to explain

    all pipes checked for leaks etc

    i am now thinking it could be viens in the turbo?
    i have heard it mentioned before but not sure of effects if it was this.

    anyway of testing if its viens?

    cheers for any advice

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    2.2 dci diesel 2002

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