Chris NottAH Fabrications
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  1. #1
    A4 Quattro Sport's Avatar
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    Help! A4 1.8TQS Cut out and wont Start

    My 1.8TQS cut out an now wont start. Just before it cut out it was really down on power and struggling to climb a hill.

    I have checked the cam timing and its fine, the fuel pump is working, it is getting a spark but still wont fire.

    I have plugged in my freeware VAG-COM and it doesn't find any fault codes under the engine module.
    Control Module Part Number: 8D0 907 558 DA

    Component and/or Version: 1.8L R4/5VT MOTR HS D01

    Software Coding: 04201

    Work Shop Code: WSC 06325

    No Faults Found

    or DTCs not supported by controller

    a communication error ocurred

    ---------------------------------

    Any help, would be much appreciated!
    Last edited by A4 Quattro Sport; 11th July 2010 at 18:23.

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  3. #2
    "Stick a V8 in it!"

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    Try unplugging the MAF sensor?

    You may need to remove and dry off or replace the plugs, as they might be soaked with fuel.

    Is it actually injecting petrol?

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
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  4. #3
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    my money is on the lower pulley key sheared, but could just as easily be fuel pump or relay related

  5. #4
    jcb
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    ditto, check you timing (front pulley to cover notch and cam gear to cylinder head.
    I bet it is not firing because it has zero compression due to the bent exhaust valves.
    either crank pulley or stripped belt jump a few teeth

  6. #5
    "Stick a V8 in it!"

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    If it had mashed its valves you'd hear it when cranking surely?

    Engines with no compression sound totally different to normal ones, you dont get the characteristic "wub wub wub wub" noise when cranking.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  7. #6
    A4 Quattro Sport's Avatar
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    Thanks guys. I'll check the timing tonight.
    The cambelt tensioner failed a few month ago and i had to rebuild top end replacing all the exhaust valves. Belt looks ok, but sheared pulley key could be the answer, the pulley may have gradually crept round so far that the timing is out.

    Hopefully no bent valves. :-(

  8. #7
    6th Gear

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    If there is no start there are many bent valves...
    FOR SALE:
    -Golf mk 5/audi a3 1.6 FSI fuel pump, brand new genuine part boxed + seals
    -audi a3 (1998 to 2003) genuine clutch slave cylinder to fit 1.6 engines BRAND NEW
    -Rear bush press tool to fit new rear axle bushes on Golf Mk3/4, Audi a3/S3, Seat Leon/Toledo, Skoda Octavia mk 1/2 used once

  9. #8
    A4 Quattro Sport's Avatar
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    it was a sheared pulley key. All sorted and started no problem.

 

 

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