Hey all, curious as to if anyone else has experienced this issue. Its now happened to me 3 or 4 times on my P400; when mildly accelerating from around 20 mph (think freeway on-ramp type acceleration) using about half-throttle, I'll get this quick series of rattles from the engine bay accompanied by a brief power loss. It's almost like it goes into a brief limp mode. If I continue to roll into the throttle, nothing happens, I don't get any more rattling but the truck also doesn't want to continue to accelerate. If I release the throttle and then give it 75% to 100% it will finally kick down and accelerate.

I'm not getting any kind of warnings on the dash or codes as far as I can tell.

Before I call the dealer for yet another service appointment I figured I'd see if anyone else had experienced this.

 

Sounds like engine knock, which is being detected by the fuel injection system/knock sensors, and thus playing with timing and fuel or whatever to pull back on power to protect the engine. Def have it looked at. Still under warranty?