my ram 4.7 hesatats when take off.like its not getting any fuel.

If you have a check engine light on, then by all means you need to check that code, because that will help you. As for your symptom, there could be so many things to cause that, like a defective throttle position sensor, bad ignition coils, I have seen a bad crank sensor cause this type of complaint. I would start by getting the code, most likely that check engine light has been or is on.