You're asking the wrong question -- you need to focus on system performance, not a number on a screen.
If your system is operating normally, performance meets your requirements, and your load average is not excessively high (indicating a long wait for process to get the CPU when they ask for it), you have no problem to solve.
If you are experiencing a performance problem that's what you should be asking us about (the fact that your CPU is pegged is incidental, and would be helpful when trying to help you solve a performance problem).
You don't tell us which "CPU Utilization" number you're talking about, but it really doesn't matter -- It is a common misconception that "100% CPU utilization" is a Bad thing. It isn't.
A computer running at 100% CPU utilization, absent any performance issues, is NOT a problem, unless you anticipate substantial growth that would over-tax the available CPU bandwidth in the future (within the lifetime of the system).