I have two symptoms....

One....from cold I need to push the accelerator to the floor. A big "no no" on modern cars but as I don't care about the cat on the Q4 it doesn't really matter. Car will catch ok and then be a bit lumpy for a few second but eventually settle down. Trying to start without putting my foot to the floor will result in backfiring/popping.

Fuelling problem perhaps???
Idle actuator (where is it?)???

Two...when warm, foot needs to be flat to the floor again but the car will usually only start when I release the key?!?!?!

Any ideas?

wrinx