I trying searching for a treat here but no luck...Problem is when car set over night or days, it won't hold idles when start up. I would have to hold gas pedal for a while for idles to stay. It only does it when car is cold. Anyone know what going on here...Please help.

 

Fuel pump or fuel filter..less chance but also possibly injectors

 

Check your basics... MAF, fuel pressure, any check engine lights?

 

Clean the throttle body. I've been there, and done that.