Ok, I am stopped at a stop signand I go to take off, I noticed that the truck sounds a little different but nothing a kid runs out in front of me so I let off the throttle. Truck sputters and dies. Start it up and runs good. I was curious to know if it will do it again, so i pull into a parking lot, stop take off, truck sounds a little funny again let off the throttle at 1700 rpm and it dies. I don't have a cel or anything replaced cam sensor today nothing different. Also it seems like if you are merging and have the throttle down and let off the truck wants to lurch forward like it has more power. Is it a tps?