I have a 2001 Dodge ram 1500 with the 5.2 V8 and the problem is some days I can crank it and it will idle about 2500 rpm and other days I can crank it and it will idle about 700 rpm and when it idles low it hesitates and stalls bad acts like it won't accept any acceleration until mashed almost to the floor I've changed the IAC valve and the TPS but no luck

 

Getting any codes?

Normal idle is around 650-700..... How is your fuel pressure?

 

I just changed the fuel pump about a month ago but haven't put a fuel test on it that's my next step and I haven't had a chance to get it on a handheld yet

 

What brand pump did you put in?

 

Honestly I don't remember i ordered it from rock Auto

 

It was doing this before the pump went out I just replaced it to try to get it back on the road bc it's my way back and forth

 

Is the check engine lite on?

 

Yes it is

 

And also when accelerating it has a sucking noise like it's pulling to much air through the throttle body I've checked all vacuum lines that I can get to

 

One of your local parts stores should be able to read codes for you. Need to know what is upsetting the computer. Otherwise, we are just guessing.