Did you have the PCM programmed for your truck using the VIN number?If not that could be your problem.Been dealing with non stop headChes with this truck.. Just put new engine in with a new pcm fuel pump. When u normally stomp on a hemi it moves.. Not this truck stomp it from a dead stop it barely moves. Dosnt shift or rev to 5500 rpm like normal hemi does.. Hangs in gears. Fuel pressure is good.. Cats are good. It stalls at lights and on turns... Feels starved or something. Never seen this before it feels like its running at 20% of the power it should have. Barely climb the smallest hills. Any ideas or feed back is much apprciated. This is killin me!