I purchased a 2001 IH T444E box truck that was a Budget leased/fleet truck. I have removed the box and installed my horse box on it. Presently I am very happy with it but my truck NEVER goes over 2500 rpm. Could there be a govenor installed? Also there is no throttle cable per say... it is more of a electronic throttle linkage, could there be an adjustment in this device??? I am thinking that because it was a fleet/ lease vehicle maintained by Budget they might do this to limit engine damage and repairs. Any help or ideas would be greatly appreciated.