I have a 2002 4.7 4x4 SXT with a stalling problem. once the engine warms up it just shuts off - no stumbling or anything. after it shuts down the fuel pump relay keeps running and the injectors keep cycling (hundreds of clicking noises going off) and tachometer jump around between 1,000 and 4,500 as long as the key is on. One time it put enough fuel in the cylinders over a 30 second period that I had to take out the plugs to blow the fuel out of cyl's 3-8 (I don''t know why not 1 and 2). Noticed some corrosion on the positive terminal so I cleaned it thoroughly. also, battery had a dead cell so I replaced it. code 0320 (CKP sensor) came on so I replaced it. When engine temp is below normal, it runs great. Once engine warms up it just shuts off if you try to restart it you have to put your foot to the floor like it's flooded and when it starts it only runs for a few seconds before shutting down again. Checked most of the grounds and could not find any dirty connections. I am thinking the PCM went south except for the enging temp issue. Any ideas? this is my wife's car and I am gone most of the time installing antennas for wi-fi. also tried swapping fuel pump, engine, and ebl relays to verify they were not the cause.

 

check the grounds, and all the connections on the engine sensors, to the injectors (especially 1 and 2 which didnt keep cycling) and the connections to each coil pack and at the pcm itself

 

Could be a Camshaft sensor. But if you didn't unhook the battery before intalling the Crankshaft Sensor then you could have ruined it.