When cold runs great no problem. After warming up to normal operating temperature with new 180 thermostat my 1995 Mustang gt looses power when accelerating hard while parked or driving @ 4000-5000 rpm. I have replaced the ICM, Mass Air Flow Sensor, the Engine Temp. Sensor, Coil, and Fuel Filter, all to no avail. I am stumped. Could the PIP cause this problem? Any help on this matter is appreciated. Thanks .