cranks and runs about 3 seconds

Exact same issue.... Starts and runs just fine, for 3sec and dies. Usually needs done 3x before starts and remains started. Took to the Dodge dealer and they said replace the plugs, $475CAD, I asked why, they said it was a guess assuming the plugs are original and old (2003 Dodge). They didn't look at them, didn't do a pressure test, compression test or anything... just couldn't replicate the issue and guessed. Was random and seemed to really only happen on really hot days. That was end of summer... got cold and didn't happen anymore, until around Xmas it was happening non-stop, every time I got into the truck. Saw a post about a sticky ball in the check valve and suggested to run fuel system cleaner through. Ran it through (twice) and car didn't stall again for 6 weeks. Now, past week had 2 single stalls again. Not sure if the cleaner helped, or coincidence. 2003 Dodge Ram 1500 4x4 5.7l Hemi

@GuruCZ4LF .... any luck?