To clarify my unloaded/loaded post, personally, I wouldn't hold it wide open in manual on the rev limiter for an extended time (like my daughter did the first few times she drove it) or fall asleep after few to many drinks with the peddle on the floor (like my buddies dad did that got to drive demo trucks home!) I wouldn't be much worried about the motor, just maybe a rich/lean condition. I have a lot of use with the ignition limiters in carbureted motors. You tend to load the motor up a lot and wash the oil off the cylinders and dirty the plugs. I know most FI motors cut fuel and would think they would alternate ignition also to keep a lean condition from happening. Running lean can be very bad pretty quickly. Normal driving hitting the limiter should be no problem. My truck doesn’t sound any different on the limiter but it is drive by wire and god knows what the throttle blades are actually doing along with everything else.
