Mybravada runs great until it gets to operating temp then it starts to hesitateunder heavy load,pulling away from a stop signor going up a hill. It gets worse when I pull my trailor. So far I have put in Fuel Pump & Filter, New Plugs, Cap, Rotor, Wires, O2 Sensor, Cleaned the EGR Valve and put a screen under it, and new PVC valve. I have a lawn care business and need my truck daily. If anyone has any other Ideas I would greatly appreciate it. Oh, Yea! I also looked at the exhaust manifold and did not see any cracks that might leak air in and mess with the O2 sensors.