yesterday i started up my truck and i hit the gas in park and my truck wanted to bog out, and it didnt rev..it took a couple of times and finally reved fine...but all so when i rev it there is a rattling noise at the end of the rev...now i dont think its coming from the engine its self and i dont think its the cat...its right under me, and the truck runs strong and dones shift or act funny besides that....

anyone have any ideas?

03 1500 4.7 4x4

 

for the rattle i'd check the simple stuff first....heat sheilds and things of that nature....as for the bogging down at a cold start....pull the TB and give a good cleaning, tune up wouldn't be out of question either