bad MAP sensor?

I have an '01 cherokee that keeps giving me random misfire codes but only after it has warmed up and it's shut down and restarted. I have scanned it with my OBD II tool and here's the info:

Report Date: 4-21-2010 (9:44 AM)
Vehicle Year: 2001
Vehicle Make: Jeep
Vehicle Model: Cherokee
Vehicle Engine Size: 4.0
Vehicle VIN:
Vehicle License Plate:
Vehicle Mileage:
Stored:
P0303 Cylinder 3 Misfire Detected

Pending:
P0300 Random Misfire Detected
P0301 Cylinder 1 Misfire Detected
MIL ON
MisFire Monitor Complete
Fuel System Monitor Complete
Comprehensive Component Monitor Complete
Catalyst Monitor Complete
Heated Catalyst Monitor Not Supported
Evaporative System Monitor Complete
Secondary Air System Monitor Not Supported
A/C System Refrigerant Monitor Not Supported
Oxygen Sensor Monitor Complete
Oxygen Sensor Heater Monitor Complete
EGR System Monitor Not Supported
DTC for which Freeze Frame was Stored P0303
Fuel System 1 Status Closed Loop
Fuel System 2 Status Closed Loop
Calculated LOAD Value 18.04 %
Engine Coolant Temp 206.60 °F
Short Term Fuel Trim - Bank 1 4.69 %
Long Term Fuel Trim - Bank 1 -0.78 %
Short Term Fuel Trim - Bank 2 5.47 %
Long Term Fuel Trim - Bank 2 0.78 %
Intake Manifold Absolute Pressure 0.00 inHg
Engine RPM 0 rpm
Vehicle Speed Sensor 15.53 mph

Could this be a bad MAP sensor, what's with the 0 reading and the 0 RPM reading? Please help!

Probably not the MAP sensor. There is likely a conflict between you scanner and the vehicle. If the MAP was reading 0 while the engine was running it would have flagged a code for it. I would focus on cylinders 1 and 3 checking the basics.

Search on "heat soak". It's a common problem for 2000+ XJs. There's a TSB on it that involved adding an insulator around the #3 injector.

I saw that TSB and I wrapped all injectors with insulation. I also changed the crankshaft postion sensor, coil rail, throttle position sensor and cleaned the entire throttle body with carb cleaner. The funny thing is that I often get the random misfire code, and the MAP sensor reading is at 0 everytime. If it were the MAP or O2 sensors they should throw a code. Maybe it could still be vapor locking?? What do you think?