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#1
14th October 2015, 01:05 PM
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RPM fluctuation
Hi everyone
I bought my A8L 2000 4.2 three weeks ago. Since then I experiencing RPM fluctuation around 40mph. Computer scan didn't showed any errors. Maybe someone had same issue or have any ideas what reason of fault. Thanks for help Igor
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 A8 Rules 
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#2
14th October 2015, 01:46 PM
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Gearbox? Old boxes which haven't been recently serviced sometimes make the revs flutter between 4th and 5th gear.
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Currently '8-less Previously: - Aqua Blue Pearl D3 S8 - Kamut Beige leather, ACC, B&O, factory RSE, solar sunroof, electric blinds, ski bag, Homelink, comfort headrests. - Aqua Blue D2 S8 - Grey leather/Alcantara - D3 A8 3.0 CVT - D3 3.7 V8
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#3
14th October 2015, 02:03 PM
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or possibly have you checked the operation of the 2 bellows under the bonnet when somebody starts the car to make sure that the manifold flaps are operating and not sticking?
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Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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#5
14th October 2015, 04:01 PM
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Quote:
__________________
Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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#6
17th October 2015, 09:55 AM
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This is odd because my car has a similar issue, but its in all gears and at any range.
The issue I have seen goes like this. Take foot off the gas, the car slows down as normal - RPM are smooth Put you foot down hard, car engages fine, the RPM's engage and stay locked. If you are driving along, and as with any A8 you are hovering at a low RPM, and you put you foot down a little, you hear the engine RPM rise, but then, as it tries to keep going, there almost seems to be a clutch slip, the RPM jumps, then engages again. In addition, if you are trying to maintain a speed - 30, or 40, you will see the RPM need jumping 200rpm ever so often. This isnt a massive issue for me, but it can be irritating. It only seems to happen when the cars at low RPM. The worst one is when you are stuck in 50mph contraflows on the motorway. Cars in 5th, and right at the lower end of the gear, and it just sit there jumping. Change to tip mode and put it in 4th seems to be the only solution. I had thought it was the Torque converter on the box that was causing this.
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Linear Mode
