2001 GT will not start code P0107 ?

the engine turns but wont start. if it dose start up it shuts down right-away we put a reader on the car and it came back with code (P0107) MAP sensor circuit low input? so we changed the map sensor and still the same thing comes up. any ideas please help...

Did you check the wires to the MAP and its cicuits?

Might Check that you are getting fuel and good pressure.
Also check to see if you are getting spark.

and Welcome to AF.

when we checked presure is low. not 50 psi. we do get spark. and the code reader said the fuel sys was ok no code? what would make the presuer go low?

First it would help to know what engine and the miles.

This could be a few things causing this.
Have you checked or replaced the fuel filter ?

Your ignition system could have a bad cicuit somewhere or have wet cicuits.
Contaminated fuel, with water or something clogging injectors.

And the cicuit low input on the MAP could have been whats wrong still, check the wires, check for vacum leaks.

Also scann for DTC's again.
Remember what the code is, and be sure to clear the code.