I havea 2002 1.8T and over the past few weeks I have noticed that when parked at a stop sign or light at idlethe rpmindicatordoesn't stay stable it goes up and down erraticallyand kinda makes a breathing sound. It's not as rough early in the morning when i start my car but it's a concern for me cos i can also feel the throttle vibrating when at idle. Does anyone know anything about this rough idles with the A4s ? Anyone have any suggestions ?

 

could be a Vac leak.
Are there any codes?
Go to autozone if you already haven't and post the code or codes.

 

yeah its mostlikely low compression or vacuum leaks, but get teh codes! maybe even ERG valve

 

There's no check engine light on though.....will they still be able to pull codes ?

 

Ye there can still be codes even with out CEL

 

Sometimes the car won't always throw the check engine light on if there's a problem.

Just try to go to autozone and see if there are any codes, better to be safe so you know where to begin