This is starting to bug me now....starting the Q4 is a bit of a lottery.
If it's not been used for a few days or a week it starts straight away after two pumps of the throttle.
Trying to start again after filling up with fuel, or an hour in the supermarket is a real lottery.
Symptoms include backfiring, cranking without firing, firing after letting go of the key (wtf?), sometimes needing throttle, sometimes foot flat to the floor and other times starting with no throttle.
I have noticed if the car is hot it starts better with no throttle, but if it's just warm it's variable.
I've replaced the plugs and water temp sensor. Now wondering if the air intake sensor might be at fault?
Any other ideas?
wrinx
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