My 87 300e will not start, degreased the engine ,hosed it off and let it dry for about 2 days. Went to start, it cranks but wont turn over, Checked dist. for cracks or moisture. pulled out a plug and no spark, tryed screwdriver to ground ,nothing. Finally bench test coil and readings to be low, so i replaced coil , still no spark. what else can i check?