WD40 is right about the Temp Probe! I had the same problem from mine when I bought it used. If you bend the end of the probe at a sharp angle where it goes into the exhuast it will short. The max CP should be around 1200mb or so. The only way that this could have been turned down is by the factory. How are the bearings? If they are binding then it could cause this problem. If in doubt call Carlos at RTI and ask him. I love my Ram 750F! I was able to get my first flights on it last weekend thanks to WD40 and also to the people at the Maury county airport ( Site of the Tennessee Jet meet!) What a great place to fly! ( June 11 -13 this year).
Good Luck!
Gene