Does your VW VR6 have Crappy idle? when you come to a stop does the idle stay high? or surge? There is a few simple things you can check to fix this. One is this: CLEAN YOUR ISV. ISV is the Idle Stabilizer Valve. As air is needed at idle, it opens and closes to adjust the amount of air to bypass the throttle body to keep the idle constant in all conditions. Thats the Idea anyway. The VR6 and others can get gummed up from oil vapor blowby from the Crankcase Ventilation system that feeds into the intake before the throttle body, after the filter.

Use a throttle body cleaner of electronics cleaner. Carb cleaner is a little too harsh and not always safe for rubber or the cat.

Step 1.
Take off the plastic cover over the VR6 throttle body

Step 2.
Remove the hose clamps on the ISV and remove ISV. See photo.





Step 3.
Spray throttle body cleaner on the isv and let soak. if you can see any gunk, clean it out. Move the valve open and close to clean it out. make sure it moves easily and smoothly. spry it again to rinse it our. Repeat if needed.

Step 4.
Let the ISV dry before reinstalling.

Step 5.
Reinstall ISV, attach hose clamps, start car. It may rev a little high if there is any cleaner fumes in the ISV. Let the VR6 run a few minutes to check if its working. go for a drive. Don't forget to put the engine cover back on too!