Not sure here as a modern motor vehicle is a complicated piece of machinery ,without reading the OBDII and having a drive my self its very difficult to give a answer as you no doubt appreciate,Now your problem could be anything from a fuel pump in the tank going down to a burnt or corroded connection on anything from a sensor to the fuel pump itself .Now as its a audi and these cars are nearly bullet proof it has to be something or nothing so i would suggest you ask a local mechanic to have a look and see what they can find ,failing which its the main dealer who can sometimes work out cheaper as you have a brand mechanic who knows his or her make of vehicle ,although ask any backstreet mechanic like myself and they will call them unit changers as thats mainly all the younger ones are .
SOURCE: car over-revving then stalling
check your idle air control motor or the throttle position sensor.
Alot of the new cars have a electronic motor that controls the butterfly valve in the throttle body, that could also be faulty and would require you to get a new throttle body, not cheap, but not outrageous in price most of the time.
If still not sure it would be best to take it to the dealer, they have specialized scanners and other tools that most regular shops do not have.
SOURCE: 2005 Audi 1.8 a4 check engine light on and car now spudders??
FYI also when you get those codes you can look them up and get their description at http://www.check-engine-light.com
SOURCE: white tail smoke, both temp gauges (oil/engine)
Alright there your on the money there. A4 audi's and The 2liter golfs do haed gaskets at around 145-150,000 miles. the oil's foamy kinda yellowie cream. Tip for ya When you do the head gasket cahnge the rad and water pump at the same time. Mine didthe same it's costly but worth it for piece of mind, Plus is the only time you get to the water pump apart from changing the timing belt.
SOURCE: 1999 AUDI A4 HAS VIBRATION AT CRUISE SPEED OF 50
Could be a unbalanced tire..
Get the tires balanced..
Some tire purchases gauranty the balance..
SOURCE: 1998 Audi A4, engine shakes/runs rough sometimes
It sounds more like you've got an intermittant vacuum leak. Try, with the engine running, spraying some WD-40 or any kind of penetrating lubricant spray,over the intake manifold area and any related vacuum lines. If you hear the engine strat to stumble, providing you're not shooting directly into the air box, concentrate the spray on that area until you're able to pinpoint a loose, cracked. or off, vacuum line or hose.
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