Start with the basics . Are you getting fuel to the rails? You might have the pump wired backwards.
It's been a long time since I looked under the hood of my 280CE, does it have ballast resistors ? If so , this is another symptom of one failing.
It's been a long time since I looked under the hood of my 280CE, does it have ballast resistors ? If so , this is another symptom of one failing.