this can be caused by a couple of things,,
1-the ignition module-even though it has a spark,,the icm can kill the injector pulse,i know you say you have replaced it,but you can get a bad new one
2-the pick-up coil in the distributer-if the pick-up is bad,you may want to replace the the complete distributor with a new rebuilt unit sense the distributor will need to be removed and took apart to replace the pick-up
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