Hi, the truck was running fine until about 6 months ago. I went to Lowe's one day and it started sputtering on the way and kicked back in and ran fine again. It wouldn't crank up when I came out of Lowe's. I left it for a couple of hours and came back and it cranked right up but it started running rough at that point. It wouldn't idle at the proper rpm's. I drove it for several months after that but it gradually got worse. It would crank and run fine as long as you were giving it gas but would choke down and not idle without pressing the gas peddle. Sometimes when running it would backfire. Now it's not running at all. I have replaced all the parts I listed in the ad but nothing has helped