https://youtu.be/zN8IlBOcc-U

been having this issue for weeks. I'll start the car, let it warm up and then I'll shut off...I then tap the gas pedal and let go and it holds like I'm still on it. Any help would be great. Recent work done before this issue was replaced water pump belt tensioner and idler pulley and also egr valve along with the rcm resolder. I replaced the egr thinking it was that causing the issue. Then had the rcm resolder by DJ Tighe thinking it would solve the problem, but no. Please please please please any ideas?