2004 ford 6cly rough idle must keep giving gas

V6? does it get any better when it warms up? Does RPM rev hi to low or does it sit at one speed and shakes? Hows the plugs? first thing first, buy a can of carb/choke cleaner $ 5.00 . Remove any plastic motor cover plates that would expose the motor. Spray cleaner around the base of the intake manifold and all mating areas of the intake manifold. ( not into the air intake) does the motor rpm change or rev up? if yes, you have bad intake gasket. also spray and check all air (vacuum) hose connections for proper fit and no cracks. Check plugs and note color and condition of each and what cylinder it was from, a brown paper bag color is normal, a super clean look is lean possible coolant leak, a burnt or melted electrode is early detonation timing, oil carbon deposit bad rings or valve guides,seals, wet is to rich , air fuel mix. Several things cause this, check all seals,air lines first,air filter, cracked or split intake tube, gasket check, does it run rough at cold idle only ( possible temp sensor ) you can check alot of things to eliminate without spending cash,