Cadillac Repair: 1992 cadillac repair, cadillac repair, cap battery

Question
I have a 92 eldorado that recently started to hesitate like it was not getting enough fuel to the injectors.  This only happen when I turned on some electrical component on like AC, Lights, Radio.  When I turn these off the car would begin to idle and accelerate correctly.  I have change almost all the electrical components such as the Alternator,modulator,coil,dist.cap, battery.  The car is still experiencing this problem.  Can you help!

Answer
Marc,
Have you checked the main power inputs to the ECM with a meter? Start by checking at the battery and move outward toward the ECM looking for voltage drops when one of the accessories mentioned is turned on. You may be experiencing some sort of short.