[g1smith]

Mine Too!
My 1999 JGC 4.7 is doint the exact same thing yours is!. It started 4 months ago when the Crankshaft Sensor died. Replacing it gave me 3 months of care free driving. The intermittant stalls began 3 weeks ago. It will die more often when it's hot and all guages fall to zero. Waiting 20 - 30 minutes, (for cooling) and everything comes back on like magic and it will run fine until it dies again, usually 5 miles latter. The engine check lite is off and my OBDII reader shows no errors.

I believe that this is a PCM controlled shutdown of the Fuel and Ignition Systems due to a dangerous condition, maybe a missing signal from a heat sensitive Crank Position Sensor. The computer can shut down the gages via the "CC" Bus? My stealer says that the $450 PCM is on back order . . . perhaps because of premature failures?

I have tested and replaced the following things in an attempt to fix the temperature related stalling problem. None of them has fixed the problem.
1. Fuel pump/delivery (I have replaced the fuel pump),
2. Replaced the CPS (Crankshaft Position Sensor) 3 months ago and fixed a previous no-start problem.
3. Replaced the CPS (Crankshaft Position Sensor) again thinking I got a flakey one from the dealership.
4. Replaced the Camshaft Position Sensor.
5. I've read that the O2 Sensors should measure to 5 - 7 ohms between the two white wires. Mine measure 14 Ohms between the two black wires.
6. I have a K'nN Air filter. Another poster stated that the oil used in these filters can contaminate the MAP sensor. I removed and cleaned the MAP sensor.
7. Removed and measured the TPS (Throttle Position Sensor) throughout the entire range of movement with both a digital and an analog ohm meter. Measured smooth from 5,000 ohms down to 500.
8. Removed and cleaned the IAS (Idle Air Motor).
9. Measured the Engine Coolant Temperature sensor at 1600 ohms.
10. Measured the Intake Air Temperature sensor at 3000 ohms.
11. Removed and cleaned numerous grounds from the PCM to the engine block,
12. I don't hear any gush of air when removing the Gas Cap, but neither does any of my other cars, so I don't think this could be a faulty gas cap.
13. Coils? My 99 JGC is equipped with "Coil over Spark Plug" technology, e.g., 8 little high voltage ignition coils build into the individual spark plug caps. I doubt that all 8 are failing at once. Another post states that changing out the plugs every 3 months seems to help but believes that's just masking some other problem.

I too have spent way too much money on a problem most likely due to a factory design problem.
Please e-mail me too.
Thanks,