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Thread: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine

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  1. Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    My Audi has an intermittent power loss and misfire. It can happen two days running, or be 2 weeks between problems.
    There is no pattern to the power loss and misfire, and occurs no matter what the speed, load or engine revs.
    There are no fault codes.
    I have had 2 garages look at the problem with no result.
    I have changed: -
    ingnition amplifier
    all coil packs
    N75 valve
    spark plugs
    petrol filter
    cleaned the throttle body.
    One of the garages carried out a smoke test to check for leaky pipes.

    Fuel consumption appears to be fine.

    When this power loss occurs the car will idle - but roughly. If it is turned off and then restarted it is fine - no more misfire/powerloss.

    This is otherwise a lovely car and I do not want to get rid of it, but I can't trust it.
     
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  2. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    Do you have a performance “cone filter” intake installed?
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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  3. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    Quote Originally Posted by Crasher View Post
    Do you have a performance “cone filter” intake installed?
    Thank you for your prompt response.

    No, I do not. I believe the car to be in original spec.
     
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  4. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    What is being used to check for fault codes?
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
    !


     
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  5. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    The vehicle was first checked out at an Audi main dealer. Following that it was taken to an independent garage that had a good reputation for working with Audis. Finally it was taken to an independent BMW specialist because I was impressed with their setup, the way they worked and that they had worked well on my BMW.

    All found that the fault was not generating any codes.
     
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  6. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    OK, you need to start with a fault code read carried out using a VAG specific system such as VCDS.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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  7. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    Thank you.

    I'll look for someone in my area that can offer this service.
     
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  8. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    Is there a VAG Com section on the forum that may list specialist offering this service in my area?
     
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  9. Re: Intermittent power loss Audi A3 8L 1.8T 1998 AGU engine 
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    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

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