I have an audi a4 2001 model 1.8L non turbo. It recently had a problem in idling(it was going up & down between 200 & 1000 revs whilst it was in park). i had it checked by the mechanic & h

Revving on Idle ' Audi-Sport.net

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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
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[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

check gate valve linkage on turbo and the fuel injector pulses

I’m happy to assist further over the phone at https://www.6ya.com/expert/howard_977676954994c5b2

reset the ECM using a scan tool as the cleaning process of the maf sensor has altered the parameters

sounds like the air flow sensor is now fully broke and the car is in limp mode . Good Luck

The thermostat is placed below water pump for 1,8L 20V engine, on VW Passat m.y. 1997:

these vehicles are known for ignition coil failure. typical symptoms include: Misfire, power loss, vibrating engine, poor fuel consumption. If the vehicle's engine vibrates, it be misfiring. Is your chk engine light on???

Engine also smokes when car driving if turbocharger still faulty. Did you change the engine timing belt (the timing belt kit) meantime? What about engine oil consumption? When engine glow plugs (one or more) burnt then engine exhausts white smoke at idling. Also white smoke at engine idling when water is still present in diesel fuel.

It needs a turbo.

The oil overfill might well be the cause of the smoke. It will be nothing to do with the overboost. That is quite a common fault and at the main dealers, Audi for me, we usually replace the turbo for that. You need to check the N75 and all the vacuum pipes etc, but when they go you dont get enough boost, when you get to much 99% of the time its the Turbo.

We arent aloud to take turbo's aparts, But In the real word I would suggest you look into having the turbo rebuilt. It is a variable vain turbo and the vains and or the actuator that control them get stuck, which causes this problem. I assume you recently purchased the vehicle, because its very common when its intermittent, for people to see that fault code, know a turbo is £1000 and sell the car.

You can drive around the problem usually, by keeping the revs up. Pulling full throttle from low rpm will bring it on more, thats how we test them.

mass air meter

Lots of things it could be. Egr valve sticking, a hose that came off, a bad sensor for airflow, or even throttle position sensor.

Intermittent nature seems to point to something sticky or loose.