CalG

OK
The wife reported that our '99 A8 seems to "drive it's self" on some of these cold mornings. Not bad, but Hmmmm.
I confirmed Sunday (-26 C), I had to ride the brakes all through town, About 5 miles.

So:

Took the ICV off tonight. (Freak'in cold tools hurt my hands just to touch them)

Brought the unit inside for a look. Nice and clean! ' hooked up the bench power supply and the valve shows a nice progressive opening as voltage is applied starting at about 4V and fully open by 8Volts. Smooth action, and no scoring or burrs on the valve.

So, What's hanging up?

If it's moisture freezing in the electrical portion of the assembly, The unit might need to sit near the wood stove for a few hours!

I spritzed the throttle cable with silly-cones while I was in there. but of course, problem only shows first thing on cold mornings.

Comments anyone?

CalG

tozoM8

grille and let it suck air from the engine bay. I don't need cold air intake this time of the year.

CalG

Oh! Like the "flex heat pipe" off the mainifold on Carburettor engines, with a bimetal controlled flapper in the air cleaner.

Now there is an idea I can work with!

I suppose a fellow could hose clamp a power resistor to the IAC valve body to warm things up. ;-)

mkurak

It's happenned to me once and then never again so far - bit scarry at first.

ricoblanco

Happened last year on the A6 and a few weeks ago on the A8. It wasn't the floor mats, that's for damn sure.

tehA8PIMP

CalG please email me if you see this, I am not on quattroworld thanks

told_uso AT yahoo dot com