Pontiac Repair: 89 firbird wont run injectors dont open up., computer car, system chip

Question
have a 1989 350 firebird has power to injectors new tune up computer, car turns over but wont stay running injectors wont open  up how do i fix that is it a sensor what one?  a map sensor need help bad!!!  mjoslows@yahoo.com  thanks

Answer
Hi
Only info I can find is the PCM controlls the injector grounds.
You MAY have a VATS problem (Vehicle Anti Theft System)Chip in key.
What is the security light / theft light doing? Is it on steady or blinking?
I would HIGHLY suspect the ignition switch in this model car.
Please follw back if needed.
Good Luck
Pawl