Question about 2005 Audi A4

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A4 2.0 TDI. Rough idle

In Nov 08 I purchased a 55 Audi A4 2.0 TDI with 40k mileage.Soon after I noticed the car at tickover (950 rpm) to suffer from a rough idle and also engine stumbles to approx 900rpm (before recovering) when the revs drop e.g when coming to a halt. These problems are intermittent and are difficult to replicate.The car was inspected by an independent Audi specialist who diagnosed injector problems and under warranty had all 4 injectors replaced (not a cheap job). The problems continued. No warning lights appear but in desperation 2 months ago I booked the car in for diagnostic check at Audi dealership. No faults were found in system. Over the past week or so the rough idle is more evident. It has been suggested that the Dual Mass Flywheel may be at fault. Has anybody any ideas?

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  • gerrysears May 18, 2009

    txkjun.

    No lack of power. However, the car does judder when labouring at very low revs. E.g. in high gear, up hill @ 1200 RPM

  • Anonymous Mar 15, 2014

    Gday
    I have a 2001 Audi a4 and it has poor power to the wheels under 2 5rpm over 3rpm it preforms like a different car Ive seen a diagnostic specialist he reset the ECM but all the codes came back and suggested the cam needed doing for the cam sensor Apparently the engine retards not to break itself Anyone have any know how on this problem

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  • Master
  • 409 Answers

You could have a bad air flow sensor. Do you also have a lack of power??

Posted on May 13, 2009

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------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
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