GTP will not start - HELP!

I just replace the intake mainfold gasket and Supercharger plenum gasket and now the car will crank but will not start. I checked one of the plugs, and I have good spark. I went on and replaced all the plugs (they were due). I do have a code 0123 which is Throttle position sensor "high". It was working fine before I did this (had a oil leak). Help, it's my wifes car and she's kinda wants it back.

I'd take the DTC at face value and check into a bad TPS. The sensor high voltage feeding back to the PCM module is out of tolerance or exceeding > 4.71 volts. First remove and reseat the electrical connector to the TPS. If DTC persists then check the PCM reference voltage at the electrical connector. Gray wire should read around 4.95 volts. Then check output at Dk Blue wire. Black is ground.