Have a 2002 dodge ram 1500 with the 4.7. I replaced the passenger head made sure everything was timed I checked it 10 times so I didn't have to rip it back apart.....now I can get it to start and idle just fine no issues and no noises but if I throttle up and let it idle back down it stalls then has a hard time starting back up......sometimes you can rev it up a couple times before it stalls and sometimes you can I have checked vacuum hoses and everything I can think of...any help would be great