I bought a 2018 Raptor recently with their full warranty. 6 weeks in had the new full cam phaser replacement with VCT and PCM flash. Go out this morning and still have a cold start rattle for 20ish seconds. The truck was initially experiencing occasional rough idle and loss of power with the rattle which is why I took it in. That, so far, hasn't come back but it's only been 50 miles. it also feels a bit sluggish and I notice an ever so slight roughness when I floor it. It's barely noticeable and I may just be so overly sensitive but it feels like it's intermittent through the power band instead of smooth. Call back into the dealership and waiting for response. Any thoughts in what else it could be or how I should proceed?