After sitting all night my S40 is hard to start in the morninings, After about five attempts it will run and you have to feather the fuel pedal, But once warmed up is fine and for the rest of the day, even after sitting at the office for 8 or 9 hours, It will start and run just fine until the next morning.
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2002 Volvo S40 Question: Cold start problems
Answer #1Bret Bodas from RepairPal Test Shop, May 25, 2010, 12:46Master
Get the car checked for diagnostic codes and have them resolved if present. Have a shop check the idle valve, I have seen them stick and cause hard starting.
I suggest only a Volvo shop, they will know what commonly fails on these and should be able to address this for you.
Here are some near you: http://repairpal.com/directory?address=37716&car_brand_names=Volvo