hey i have a 02 grand marquis wich is my grandmas, it stoped idling the other day, once the the engine gets warm it will idle, but when it is cold it is rough or wont idle, i changed the plugs, boots, cleaned the tb and intake out, the mafs, and all it done was make it a rough or low idle when it is going till its warm again, other than that the ol tank runs fine going down the road, was wondering if anyone else has came across this .