A4 2.0 TDI. Rough idle

indicates a vacuum leak or idle speed sensor problem
may fix by increasing the idle rpm to around 800-950 rpm

Revving on Idle ' Audi-Sport.net

www.audi-sport.net > ... > A3/S3/Sportback (8P Chassis)

Feb 1, 2012 - My Car 58 S3, as of last night decided to start revving whilst on idle, I found a clip ... I can do or is it going to be a trip to audi for them to pull my pants down! ... Lots of members all over the UK have VCDS, have a look at the VCDS .....and as the engine warms up it'll auto-rev to 1000rpm every time i sit at idle. Car revving itself on idle ?
Sep 23, 2013
Whining noise when accelerating, any ideas?
Mar 15, 2012
More results from www.audi-sport.net

[FIXED] Audi A4 RPM Idle Problem - YouTube

? 2:48
https://www.youtube.com/watch?v=EG71Jz9l6qY
Feb 5, 2011 - Uploaded by RickyTomatoes
[FIXED] Audi A4 RPM Idle Problem .... whole lot more and sometime i can even feel like the engine is just gonna die. sometimes it does it some other times it does ... Our cars shouldidle at 900. ... AUDI A3 1.6 IDLE PROBLEM!

When getting into first gear, is revving to 2000 RPMs before ...

https://www.reddit.com/.../cars/.../when_getting_into_first_gear_is...

RedditSep 3, 2014 - When getting into first gear, I bring the revs up to around 2000 RPM right ... Being able to get going without any throttle is fairly dependent on car size and ...Thats how I have a 300,000 kay clutch still on my audi with no slippage. ... Clutches ought to last well over 100,000 miles if they are not abused, and ...

Revs going up and down while car is stationary - AudiForums.com

www.audiforums.com > ... > Audi Models > Audi A4 > B7 Models

It sounds like a vacuum problem is keeping the EGR valve open causing the other sensors to read this and more fuel would be injected by the ECM. u may of gotten an egr code but the problem is not the valve itself.

Sounds like a vacuum hose leak. Look under the hood for any cracked vacuum hoses and replace. listen for hissing noise.

For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------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

-----------
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

Hi, Seems like a possible inlet air leak or to low engine revs, tickover rpm to low.outside chance engine oil to thick, try lower vicousity engine oil. this sometimes works with a rebuilt motor. Could be engine is just still tight from rebuild,1-2000 miles running in should cure this. if still low mileage.

you car is fitted with a "no fuel"system,so when you take your foot off "no fuel" goes to the engine untill it reaches 1200 revs.then it will allow fuel to flow to keep tickover/smoothness.(its computer controlled)you need to get your car onto the diagnostic computer,(skoda/seat/vw/audi)so you have the codes/items that need to be sorted.The tdi engine was one of the first engines that VW computerised and it is very reliable/powerful,compared to the peugeot/citroen engine.(briefly,the fault is not just a switch/cable),

it could be that the tick over is two slow in brive,,,
set it up to tickover at 850,,950 rpm (in drive)
or it could be a gear box fult like the drive plate has a crack in it,,,letting the torque converter slap about,,,
chech tick over first,,, bont adjust tick over in gear unless the brakes are held hard on,,,

Hi Frank I am a technician with audi myself It may be that you require an engine e.c.u and not a gearbox one however has your A4 had any recalls carried out on the gearbox since purchase if not that would definately be something worth checking hope this helps.

If a/c, headlights,.. other stuff is on 950 is about right.