map sensor issue?

[SGFastMax]

im working on a 2000 silverado that i recently put a z06 cam in. it starts hard and idles very rich and rough. would this cam make it run like this? Specs are 204/218 .550/.550 with a 117.5 lsa. i ran the scan tool on it and i didnt get a map sensor reading. the needle never moved off zero. the map PID was selected in the PID's and there wasn't a line through the map gauge in the digital dashboard, so i figured the sensor was picked up by the program but it never got a reading. anyone know whats going on?

[Baldric]

did you do a shift f2 to get calibrations of supported pids ???

[ChipsByAl]

If the MAP sensor was at fault or had a wiring issue to cause zero volts, you would get a DTC immediately. The engine would possibly not even start.
Al

[SGFastMax]

we unpluged the sensor and it started and ran the same as it did with it pluged in.

[mr.prick]

You're going to need fuel adjustments after a cam,
but this will be impossible without MAP data.
Did you try logging after a reboot of the software?
Re-validate the PIDs and post a log with SAE.MAP and GM.MAP.