boost lag and fuel economy question

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  • hunker7
    replied
    Not surprising weather is complete pile of ****. I did pull the plugs out;



    I unplugged N75 and didn't see any difference either. First one is flooring it in 6th;





    Fuel consumption was 23mpg average speed was about 50mph
    Last edited by hunker7; 21 September 2015, 09:48.

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  • hunker7
    replied
    Definately running on all 5, I drove from London to Leeds in February on 4

    I will have a look tomorrow for timing mark through the little window.

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  • newsh
    replied
    Originally posted by andy10v
    When you say crank do you mean the front pulley?



    Its a 0 as Newsh picture. Are you looking in the correct hole?

    Is the cam timing in the head correct? Two O on the inside of the cam gears should be level with the top of the head and point at each other.

    MPG and performance sound way off, its no economy engine but should get 30 on cruise, drive ability about town is one of its perks.


    Timing or a misfire, maybe running on 4.

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  • hunker7
    replied
    I will take them out tomorrow and have a look at them. But it seemed like a misfire so might need to get a new set, NGK this time. No more Bosch.

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  • UrS4boy
    replied
    Originally posted by hunker7
    New shiny out of the box
    Then you might have to put the sparkplugs in the frame as the suspects.

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  • hunker7
    replied
    New shiny out of the box

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  • UrS4boy
    replied
    Originally posted by hunker7
    Got coils converted. I have Bosch plugs; could they be playing up?
    Okay. Are those coil packs new new new or did you get them at a good price off eBay?

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  • hunker7
    replied
    Got coils converted. I have Bosch plugs; could they be playing up?

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  • UrS4boy
    replied
    Improved POS diagnostics and Fix Info

    Originally posted by hunker7
    Driving to Leeds and car occasionally shakes as if it's a misfire, but less intense. Sometimes it vibrates slightly and then runs as normal again. Fuel economy is around 25mpg. Any ideas what it could be?
    Quick guess would be one of the POSs has a flaky channel, if you are still running the OE ignition system.

    Improved POS diagnostics and Fix Info:


    Click here:
    The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums



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  • hunker7
    replied
    Oil pressure/temp is good, engine temp is around 100 it that's because of ****** thermostat I think.

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  • hunker7
    replied
    Driving to Leeds and car occasionally shakes as if it's a misfire, but less intense. Sometimes it vibrates slightly and then runs as normal again. Fuel economy is around 25mpg. Any ideas what it could be?

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  • andy10v
    replied
    Originally posted by hunker7
    Marks on cam sprocket and crank was lined up perfectly.
    When you say crank do you mean the front pulley?

    Originally posted by hunker7
    I can't see it there, nothing ever remotely similar to a line. I've turned the engine over several times :/
    Its a 0 as Newsh picture. Are you looking in the correct hole?

    Is the cam timing in the head correct? Two O on the inside of the cam gears should be level with the top of the head and point at each other.

    MPG and performance sound way off, its no economy engine but should get 30 on cruise, drive ability about town is one of its perks.

    Leave a comment:


  • newsh
    replied
    Sorry just saw that ! [emoji6]

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  • hunker7
    replied
    Originally posted by newsh
    Any news?
    check above

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  • newsh
    replied
    Any news?

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