I have a 2016 SPX-19 with a 4.3 ltr v6, and while boating between 3,000 and 4,000 RPM's, there is a "dead-spot" in throttle response, the vessel actually feels like it's going to stall and when i move the throttle up or down, i find the sweet spot again. But, there is a definate compromise in throttle/engine performance between 3-4,000 RPM's? Any recommendations?