1991 Deville 4.9 starting problem
 

Okay, I have replaced the ECM and dizzy along with plugs, wires, injectors, etc. The engine will crank and I get spark at plugs, fuel pressure, and blinking noid light at injector. but it still won't start. Occasionally it fires for a second then nothing. What am I missing besides half a brain and a good mechanic? Also it won't even turn over in Neutral. Could the safety switch cause any of the above?