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  1. #1
    1st Gear

    Join Date
    Apr 2013

    Bkd tandem pump failure?

    My car takes longer to start in the mornin (when its been stood) and when it starts it misses a little and a big plume of diesel smoke. I did a diesel purge erlier and went thru the rev range went back to see how the purge was and it was black! Can the pump seal be replaced or is it a new pump? Thanks

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  3. #2
    AudiMafia's Avatar
    2nd Gear

    Join Date
    Apr 2009
    Hi, check with VCDS see if it through any faults or it could be the glow plugs??
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  4. #3
    1st Gear

    Join Date
    Apr 2013
    No codes on vcds. Glow plugs was replaced last month.

  5. #4
    Johnny Bravo's Avatar
    6+1 Gears

    Join Date
    Jun 2009
    A simple way to check if the pump is starting to fail is to leave the car one nitght parked with the front higher than the rear and see how it starts in the morning and next night parked with the front lower and again see how it starts.
    If it starts better in the second case, than its a sign that the pump can't keep the pressure overnight and you may consider a check. May be gaskets or the pump itself.

    You won't see any fault with VCDS regarding the pump.
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