I could have it hauled to the dealer for $75-$100 but would like to find out exactly what's wrong with it before I do. I hate to pay a haul bill when it something I can fix. I guess I'm going to test to see if it getting power to the cam sensor, if so I'm going to test the cam sensor. I have seen several people online have the p0633 code and it still runs. Still clueless why it has that code when this is not a skim model truck.

 

Checked the cam sensor and its getting 5v and sending 5v back to the pcm on connector 2 pin 34. Checked the injectors for 12v and they are all getting 12v from the ASD relay. Checked to see if I'm getting a ground signal from the pcm to the injectors with a noid light and I'm not getting any pulse on any of the injectors. Can anyone recommend anything else to check? I'm think a bad pcm.

 

5 volts on cam sensor should be switching as you crank the engine. Is it?

 

Yes I took the cam sensor out and tested the signal wire. I used a metal socket and it would go from 5v to 0v when applying and removing the metal socket.

 

is it working when installed?

 

That is something I didn't test while cranking. I just tested the sensor and it showed working and then tested the pin at the pcm and it showed 5v but don't know if it was switching. I'll test that later today.

 

Checked the voltage going into the pcm from the cam sensor and it pulses from 0v to 5v so the cam sensor is working and the pcm is receiving a signal. I ordered a pcm.