So my idle has been fluttering when cold and sputters when the car is still cold. But once the car warms up or has been driven for a while it seems to go away. Just the other day I added some fuel injector cleaners. And magically all that went away. So, if this solved the problem, that means i had dirty injectors. Does that mean i should look into new injectors and or fuel filter? The fuel filter has less than 20k on it.