Beechcraft 350i Loss of power

I have lost power to this aircraft. I found a mod for it but that too does not produce thrust. Anyone seen this issue and how to fix? Can get to almost end of runway and barely have enough speed to take off and slowly climb. This is a powerful aircraft and should be blasting down the runway.

I’d check your mapping for propeller RPM. If that’s set low, you won’t have usable thrust.