over the last couple of weeks my 99 dodge 2500 will only give me half trottle responce, for a few minutes, then will clear out and run fine for awile. i recently put a new vp44 and holly blue fuel pump in it. i am not getting any codes. i am out of ideas any help would be appreciated. thanx

 

Could you have a restricted fuel filter?
Have you checked LP pressure at the IP??
Is it possible you have a small air leak into fuel circuit???
Have you tried a APPS reset????
Clean all electrical connections?????

 

Adding to Dozer's clean all electrical connections...might be worth something to take out, clean and test IAT and MAP sensors. Also check their plug connections for corrosion.

 

what and where can i pick up a new iat, map sensor. where are they located i also just put a new fuel filter in and could find no leaks any where. thanks again