If I give my truck a little bit of fuel and then let off, it cuts off. It will Crank right back and do fine. Its usually when im backin up and let off to stop. Only modifications are straight pipe and silencer ring out of the turbo, Ive never messed with the fuel or anything. And its an automatic soo no im not chokin it out

 

What's your idle at. Should run around 850

 

no loping right?

 

My idles at about 750 best i can tell

 

Id bump it up a hair and try that.