When my car is sitting idled in the park position about 15-20 minutes. The RPMS are revving upward. When I put car in drive and move, they seem to be fine. No check engine light comes on! What can this be?
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You have too many zeros in your description - 25,000 revs and you would be picking up engine bits from half a mile away...
600 rpm in park and presumably revving up to 2500 when a gear is selected isn't the fault of an idle air valve (or the throttle positioning motor) but is the result of commands sent by the management system.
Restoring factory defaults should restart the self learning process and disconnecting the battery for a few hours (overnight) might restore the defaults but it might need dealer level diagnostic equipment.
You need to check the engine for a vacuum leak, use a spray can of carb spray and lightly spray around engine (do not get on paint finish) when you hit a leak the engine idle will change
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
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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!
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 ...
Cars are design to run at a higher idle at start up to warm them up quick. There is a sensor that reads water temperature and tells your car's computer how fast to idle. Your RPMs seem slightly high but not out of the norm. Does idle ever drop to around 600/800 after about a minute? If not, your engine temperature sensor maybe defective.
Check for a vacuum leak. This can cause a higher than normal idle. It can also cause a surge since the idle air control tries to adjust the amount of air required to idle.
I had the exact same problem on my 04 GC. I put some Techron Concentrate Plus Fuel System Cleaner in from Wal-Mart and it seemed to fix the problems right away. Let me know.
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