Audi A4 1.8TQ: harsh idle... Dual Mass Flywheel?
 

Hey guys,

I have a 2004 Audi A4 1.8TQ, with a mannual 6-speed transmission.

The car is vibrating at idle - it's a regular, high-frequency vibration that can be felt on the wheel and even on parts of the dashboard. The engine is running fine: no misfires, no rpm fluctuations, or anything. The car idles at about 820-830 rpm. Once the engine revs up to 870 and above, the vibration is gone.

Pressing the clutch pedal does not change anything.

I've noticed that the colder the outside T is, the worse the problem is.

I've had all plugs, coils, and both engine mounts + the snub mount replaced. No luck. I've also cleaned the throttle and the MAF.

A local repair shop said that the dual mass flywheel is causing the problem.

However, considering the cost of replacing the flywheel, I wanted to get a second opinion... Could it really be the dual mass flywheel?

Thanks

u say ur engine is running fine but u have a vibration at idle. Check ur vaccume lines. IF ur getting a studder u probably have a leak somewhere.

Have you checked the engine/tranmission mount?

I guess if the flywheel was pretty much 100% bad or coming apart it could cause a bad vibration at idle and then go away once you raise the rpm or have the car rolling in gear at a higher rpm. Usually a bad dual mass flywheel will give you a clunk/bang when engaging the clutch from a start or when shifting gears.